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Finding the Fourth Proportional to 567.91, 783.32 and 521.43

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Solution

The fourth proportional to 567.91, 783.32 and 521.43 is: 719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.91 : 783.32 = 521.43 : x
  2. Step 2: Convert to fraction form
    567.91/783.32 = 521.43/x
  3. Step 3: Cross multiply
    567.91x = 783.32 × 521.43
  4. Step 4: Simplify right side
    567.91x = 408,446.55
  5. Step 5: Solve for x
    x = 408,446.55/567.91
  6. Step 6: Final answer
    x = 719.21

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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.