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Finding the Fourth Proportional to 638.59, 953.56 and 507.12

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Solution

The fourth proportional to 638.59, 953.56 and 507.12 is: 757.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.59 : 953.56 = 507.12 : x
  2. Step 2: Convert to fraction form
    638.59/953.56 = 507.12/x
  3. Step 3: Cross multiply
    638.59x = 953.56 × 507.12
  4. Step 4: Simplify right side
    638.59x = 483,564.58
  5. Step 5: Solve for x
    x = 483,564.58/638.59
  6. Step 6: Final answer
    x = 757.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.