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Finding the Fourth Proportional to 590.28, 813.90 and 521.16

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Solution

The fourth proportional to 590.28, 813.90 and 521.16 is: 718.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.28 : 813.90 = 521.16 : x
  2. Step 2: Convert to fraction form
    590.28/813.90 = 521.16/x
  3. Step 3: Cross multiply
    590.28x = 813.90 × 521.16
  4. Step 4: Simplify right side
    590.28x = 424,172.12
  5. Step 5: Solve for x
    x = 424,172.12/590.28
  6. Step 6: Final answer
    x = 718.59

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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.