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Finding the Fourth Proportional to 898.03, 1,239.28 and 505.05

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Solution

The fourth proportional to 898.03, 1,239.28 and 505.05 is: 696.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.03 : 1,239.28 = 505.05 : x
  2. Step 2: Convert to fraction form
    898.03/1,239.28 = 505.05/x
  3. Step 3: Cross multiply
    898.03x = 1,239.28 × 505.05
  4. Step 4: Simplify right side
    898.03x = 625,898.36
  5. Step 5: Solve for x
    x = 625,898.36/898.03
  6. Step 6: Final answer
    x = 696.97

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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.