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Finding the Fourth Proportional to 477.32, 715.42 and 385.48

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Solution

The fourth proportional to 477.32, 715.42 and 385.48 is: 577.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.32 : 715.42 = 385.48 : x
  2. Step 2: Convert to fraction form
    477.32/715.42 = 385.48/x
  3. Step 3: Cross multiply
    477.32x = 715.42 × 385.48
  4. Step 4: Simplify right side
    477.32x = 275,780.10
  5. Step 5: Solve for x
    x = 275,780.10/477.32
  6. Step 6: Final answer
    x = 577.77

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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.