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Finding the Fourth Proportional to 407,862.40, 611,793.60 and 108,389.20

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Solution

The fourth proportional to 407,862.40, 611,793.60 and 108,389.20 is: 162,583.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,862.40 : 611,793.60 = 108,389.20 : x
  2. Step 2: Convert to fraction form
    407,862.40/611,793.60 = 108,389.20/x
  3. Step 3: Cross multiply
    407,862.40x = 611,793.60 × 108,389.20
  4. Step 4: Simplify right side
    407,862.40x = 66,311,818,869.12
  5. Step 5: Solve for x
    x = 66,311,818,869.12/407,862.40
  6. Step 6: Final answer
    x = 162,583.80

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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.