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Finding the Fourth Proportional to 898.08, 1,239.41 and 505.13

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Solution

The fourth proportional to 898.08, 1,239.41 and 505.13 is: 697.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.08 : 1,239.41 = 505.13 : x
  2. Step 2: Convert to fraction form
    898.08/1,239.41 = 505.13/x
  3. Step 3: Cross multiply
    898.08x = 1,239.41 × 505.13
  4. Step 4: Simplify right side
    898.08x = 626,063.17
  5. Step 5: Solve for x
    x = 626,063.17/898.08
  6. Step 6: Final answer
    x = 697.11

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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.