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Finding the Fourth Proportional to 947.40, 1,417.26 and 702.20

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Solution

The fourth proportional to 947.40, 1,417.26 and 702.20 is: 1,050.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.40 : 1,417.26 = 702.20 : x
  2. Step 2: Convert to fraction form
    947.40/1,417.26 = 702.20/x
  3. Step 3: Cross multiply
    947.40x = 1,417.26 × 702.20
  4. Step 4: Simplify right side
    947.40x = 995,199.97
  5. Step 5: Solve for x
    x = 995,199.97/947.40
  6. Step 6: Final answer
    x = 1,050.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.