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Finding the Fourth Proportional to 1,432.40, 1,976.83 and 802.92

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Solution

The fourth proportional to 1,432.40, 1,976.83 and 802.92 is: 1,108.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.40 : 1,976.83 = 802.92 : x
  2. Step 2: Convert to fraction form
    1,432.40/1,976.83 = 802.92/x
  3. Step 3: Cross multiply
    1,432.40x = 1,976.83 × 802.92
  4. Step 4: Simplify right side
    1,432.40x = 1,587,230.11
  5. Step 5: Solve for x
    x = 1,587,230.11/1,432.40
  6. Step 6: Final answer
    x = 1,108.09

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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.