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Finding the Fourth Proportional to 462.64, 638.11 and 315.02

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Solution

The fourth proportional to 462.64, 638.11 and 315.02 is: 434.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.64 : 638.11 = 315.02 : x
  2. Step 2: Convert to fraction form
    462.64/638.11 = 315.02/x
  3. Step 3: Cross multiply
    462.64x = 638.11 × 315.02
  4. Step 4: Simplify right side
    462.64x = 201,017.41
  5. Step 5: Solve for x
    x = 201,017.41/462.64
  6. Step 6: Final answer
    x = 434.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.