Home / 648,136.20-972,204.30-424,187.40

Finding the Fourth Proportional to 648,136.20, 972,204.30 and 424,187.40

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Solution

The fourth proportional to 648,136.20, 972,204.30 and 424,187.40 is: 636,281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,136.20 : 972,204.30 = 424,187.40 : x
  2. Step 2: Convert to fraction form
    648,136.20/972,204.30 = 424,187.40/x
  3. Step 3: Cross multiply
    648,136.20x = 972,204.30 × 424,187.40
  4. Step 4: Simplify right side
    648,136.20x = 412,396,814,285.82
  5. Step 5: Solve for x
    x = 412,396,814,285.82/648,136.20
  6. Step 6: Final answer
    x = 636,281.10

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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.