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Finding the Fourth Proportional to 899.52, 1,240.56 and 702.69

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Solution

The fourth proportional to 899.52, 1,240.56 and 702.69 is: 969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.52 : 1,240.56 = 702.69 : x
  2. Step 2: Convert to fraction form
    899.52/1,240.56 = 702.69/x
  3. Step 3: Cross multiply
    899.52x = 1,240.56 × 702.69
  4. Step 4: Simplify right side
    899.52x = 871,729.11
  5. Step 5: Solve for x
    x = 871,729.11/899.52
  6. Step 6: Final answer
    x = 969.10

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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.