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Finding the Fourth Proportional to 802.40, 1,197.24 and 674.40

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Solution

The fourth proportional to 802.40, 1,197.24 and 674.40 is: 1,006.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.40 : 1,197.24 = 674.40 : x
  2. Step 2: Convert to fraction form
    802.40/1,197.24 = 674.40/x
  3. Step 3: Cross multiply
    802.40x = 1,197.24 × 674.40
  4. Step 4: Simplify right side
    802.40x = 807,418.66
  5. Step 5: Solve for x
    x = 807,418.66/802.40
  6. Step 6: Final answer
    x = 1,006.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.