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Finding the Fourth Proportional to 648,117.70, 972,176.55 and 424,168.90

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Solution

The fourth proportional to 648,117.70, 972,176.55 and 424,168.90 is: 636,253.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,117.70 : 972,176.55 = 424,168.90 : x
  2. Step 2: Convert to fraction form
    648,117.70/972,176.55 = 424,168.90/x
  3. Step 3: Cross multiply
    648,117.70x = 972,176.55 × 424,168.90
  4. Step 4: Simplify right side
    648,117.70x = 412,367,057,819.30
  5. Step 5: Solve for x
    x = 412,367,057,819.30/648,117.70
  6. Step 6: Final answer
    x = 636,253.35

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Half scale
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Double scale
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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.