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Finding the Fourth Proportional to 1,302.04, 1,948.92 and 862.39

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Solution

The fourth proportional to 1,302.04, 1,948.92 and 862.39 is: 1,290.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302.04 : 1,948.92 = 862.39 : x
  2. Step 2: Convert to fraction form
    1,302.04/1,948.92 = 862.39/x
  3. Step 3: Cross multiply
    1,302.04x = 1,948.92 × 862.39
  4. Step 4: Simplify right side
    1,302.04x = 1,680,729.12
  5. Step 5: Solve for x
    x = 1,680,729.12/1,302.04
  6. Step 6: Final answer
    x = 1,290.84

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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.