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Finding the Fourth Proportional to 648,135.70, 972,203.55 and 424,186.90

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Solution

The fourth proportional to 648,135.70, 972,203.55 and 424,186.90 is: 636,280.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,135.70 : 972,203.55 = 424,186.90 : x
  2. Step 2: Convert to fraction form
    648,135.70/972,203.55 = 424,186.90/x
  3. Step 3: Cross multiply
    648,135.70x = 972,203.55 × 424,186.90
  4. Step 4: Simplify right side
    648,135.70x = 412,396,010,043.50
  5. Step 5: Solve for x
    x = 412,396,010,043.50/648,135.70
  6. Step 6: Final answer
    x = 636,280.35

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Half scale
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Double scale
Find fourth proportional to 648,136.70, 972,205.05 and 424,187.90
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.