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Finding the Fourth Proportional to 1,057.38, 1,458.36 and 702.66

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Solution

The fourth proportional to 1,057.38, 1,458.36 and 702.66 is: 969.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.38 : 1,458.36 = 702.66 : x
  2. Step 2: Convert to fraction form
    1,057.38/1,458.36 = 702.66/x
  3. Step 3: Cross multiply
    1,057.38x = 1,458.36 × 702.66
  4. Step 4: Simplify right side
    1,057.38x = 1,024,731.24
  5. Step 5: Solve for x
    x = 1,024,731.24/1,057.38
  6. Step 6: Final answer
    x = 969.12

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1.5x scale

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.