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Finding the Fourth Proportional to 802.48, 1,107.10 and 487.62

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Solution

The fourth proportional to 802.48, 1,107.10 and 487.62 is: 672.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.48 : 1,107.10 = 487.62 : x
  2. Step 2: Convert to fraction form
    802.48/1,107.10 = 487.62/x
  3. Step 3: Cross multiply
    802.48x = 1,107.10 × 487.62
  4. Step 4: Simplify right side
    802.48x = 539,844.10
  5. Step 5: Solve for x
    x = 539,844.10/802.48
  6. Step 6: Final answer
    x = 672.72

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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.