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Finding the Fourth Proportional to 623.71, 935.02 and 315.31

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Solution

The fourth proportional to 623.71, 935.02 and 315.31 is: 472.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.71 : 935.02 = 315.31 : x
  2. Step 2: Convert to fraction form
    623.71/935.02 = 315.31/x
  3. Step 3: Cross multiply
    623.71x = 935.02 × 315.31
  4. Step 4: Simplify right side
    623.71x = 294,821.16
  5. Step 5: Solve for x
    x = 294,821.16/623.71
  6. Step 6: Final answer
    x = 472.69

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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.