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Finding the Fourth Proportional to 477.70, 716.55 and 472.90

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Solution

The fourth proportional to 477.70, 716.55 and 472.90 is: 709.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.70 : 716.55 = 472.90 : x
  2. Step 2: Convert to fraction form
    477.70/716.55 = 472.90/x
  3. Step 3: Cross multiply
    477.70x = 716.55 × 472.90
  4. Step 4: Simplify right side
    477.70x = 338,856.50
  5. Step 5: Solve for x
    x = 338,856.50/477.70
  6. Step 6: Final answer
    x = 709.35

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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.