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Finding the Fourth Proportional to 581.88, 871.47 and 459.30

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Solution

The fourth proportional to 581.88, 871.47 and 459.30 is: 687.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.88 : 871.47 = 459.30 : x
  2. Step 2: Convert to fraction form
    581.88/871.47 = 459.30/x
  3. Step 3: Cross multiply
    581.88x = 871.47 × 459.30
  4. Step 4: Simplify right side
    581.88x = 400,266.17
  5. Step 5: Solve for x
    x = 400,266.17/581.88
  6. Step 6: Final answer
    x = 687.88

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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.