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Finding the Fourth Proportional to 370.72, 553.32 and 315.52

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Solution

The fourth proportional to 370.72, 553.32 and 315.52 is: 470.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.72 : 553.32 = 315.52 : x
  2. Step 2: Convert to fraction form
    370.72/553.32 = 315.52/x
  3. Step 3: Cross multiply
    370.72x = 553.32 × 315.52
  4. Step 4: Simplify right side
    370.72x = 174,583.53
  5. Step 5: Solve for x
    x = 174,583.53/370.72
  6. Step 6: Final answer
    x = 470.93

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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.