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Finding the Fourth Proportional to 565.12, 778.32 and 521.92

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Solution

The fourth proportional to 565.12, 778.32 and 521.92 is: 718.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.12 : 778.32 = 521.92 : x
  2. Step 2: Convert to fraction form
    565.12/778.32 = 521.92/x
  3. Step 3: Cross multiply
    565.12x = 778.32 × 521.92
  4. Step 4: Simplify right side
    565.12x = 406,220.77
  5. Step 5: Solve for x
    x = 406,220.77/565.12
  6. Step 6: Final answer
    x = 718.82

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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.