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Finding the Fourth Proportional to 868,492.80, 1,304,294.40 and 840,499.20

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Solution

The fourth proportional to 868,492.80, 1,304,294.40 and 840,499.20 is: 1,262,253.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,492.80 : 1,304,294.40 = 840,499.20 : x
  2. Step 2: Convert to fraction form
    868,492.80/1,304,294.40 = 840,499.20/x
  3. Step 3: Cross multiply
    868,492.80x = 1,304,294.40 × 840,499.20
  4. Step 4: Simplify right side
    868,492.80x = 1,096,258,399,764.48
  5. Step 5: Solve for x
    x = 1,096,258,399,764.48/868,492.80
  6. Step 6: Final answer
    x = 1,262,253.87

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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.