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Finding the Fourth Proportional to 557.46, 831.47 and 479.52

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Solution

The fourth proportional to 557.46, 831.47 and 479.52 is: 715.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.46 : 831.47 = 479.52 : x
  2. Step 2: Convert to fraction form
    557.46/831.47 = 479.52/x
  3. Step 3: Cross multiply
    557.46x = 831.47 × 479.52
  4. Step 4: Simplify right side
    557.46x = 398,704.10
  5. Step 5: Solve for x
    x = 398,704.10/557.46
  6. Step 6: Final answer
    x = 715.22

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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.