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Finding the Fourth Proportional to 356.87, 532.55 and 315.87

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Solution

The fourth proportional to 356.87, 532.55 and 315.87 is: 471.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.87 : 532.55 = 315.87 : x
  2. Step 2: Convert to fraction form
    356.87/532.55 = 315.87/x
  3. Step 3: Cross multiply
    356.87x = 532.55 × 315.87
  4. Step 4: Simplify right side
    356.87x = 168,214.99
  5. Step 5: Solve for x
    x = 168,214.99/356.87
  6. Step 6: Final answer
    x = 471.36

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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.