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Finding the Fourth Proportional to 807.48, 1,115.34 and 702.36

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Solution

The fourth proportional to 807.48, 1,115.34 and 702.36 is: 970.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.48 : 1,115.34 = 702.36 : x
  2. Step 2: Convert to fraction form
    807.48/1,115.34 = 702.36/x
  3. Step 3: Cross multiply
    807.48x = 1,115.34 × 702.36
  4. Step 4: Simplify right side
    807.48x = 783,370.20
  5. Step 5: Solve for x
    x = 783,370.20/807.48
  6. Step 6: Final answer
    x = 970.14

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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.