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Finding the Fourth Proportional to 520.98, 716.70 and 471.30

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Solution

The fourth proportional to 520.98, 716.70 and 471.30 is: 648.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.98 : 716.70 = 471.30 : x
  2. Step 2: Convert to fraction form
    520.98/716.70 = 471.30/x
  3. Step 3: Cross multiply
    520.98x = 716.70 × 471.30
  4. Step 4: Simplify right side
    520.98x = 337,780.71
  5. Step 5: Solve for x
    x = 337,780.71/520.98
  6. Step 6: Final answer
    x = 648.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.