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Finding the Fourth Proportional to 1,045.26, 1,442.47 and 713.68

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Solution

The fourth proportional to 1,045.26, 1,442.47 and 713.68 is: 984.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.26 : 1,442.47 = 713.68 : x
  2. Step 2: Convert to fraction form
    1,045.26/1,442.47 = 713.68/x
  3. Step 3: Cross multiply
    1,045.26x = 1,442.47 × 713.68
  4. Step 4: Simplify right side
    1,045.26x = 1,029,461.99
  5. Step 5: Solve for x
    x = 1,029,461.99/1,045.26
  6. Step 6: Final answer
    x = 984.88

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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.