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Finding the Fourth Proportional to 898.10, 1,239.58 and 566.30

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Solution

The fourth proportional to 898.10, 1,239.58 and 566.30 is: 781.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.10 : 1,239.58 = 566.30 : x
  2. Step 2: Convert to fraction form
    898.10/1,239.58 = 566.30/x
  3. Step 3: Cross multiply
    898.10x = 1,239.58 × 566.30
  4. Step 4: Simplify right side
    898.10x = 701,974.15
  5. Step 5: Solve for x
    x = 701,974.15/898.10
  6. Step 6: Final answer
    x = 781.62

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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.