Home / 648,114.20-972,171.30-424,165.40

Finding the Fourth Proportional to 648,114.20, 972,171.30 and 424,165.40

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Solution

The fourth proportional to 648,114.20, 972,171.30 and 424,165.40 is: 636,248.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,114.20 : 972,171.30 = 424,165.40 : x
  2. Step 2: Convert to fraction form
    648,114.20/972,171.30 = 424,165.40/x
  3. Step 3: Cross multiply
    648,114.20x = 972,171.30 × 424,165.40
  4. Step 4: Simplify right side
    648,114.20x = 412,361,428,333.02
  5. Step 5: Solve for x
    x = 412,361,428,333.02/648,114.20
  6. Step 6: Final answer
    x = 636,248.10

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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.