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Finding the Fourth Proportional to 581.16, 800.60 and 487.91

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Solution

The fourth proportional to 581.16, 800.60 and 487.91 is: 672.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.16 : 800.60 = 487.91 : x
  2. Step 2: Convert to fraction form
    581.16/800.60 = 487.91/x
  3. Step 3: Cross multiply
    581.16x = 800.60 × 487.91
  4. Step 4: Simplify right side
    581.16x = 390,614.30
  5. Step 5: Solve for x
    x = 390,614.30/581.16
  6. Step 6: Final answer
    x = 672.13

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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.