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Finding the Fourth Proportional to 407,855.20, 611,869.20 and 123,522.40

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Solution

The fourth proportional to 407,855.20, 611,869.20 and 123,522.40 is: 185,309.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,855.20 : 611,869.20 = 123,522.40 : x
  2. Step 2: Convert to fraction form
    407,855.20/611,869.20 = 123,522.40/x
  3. Step 3: Cross multiply
    407,855.20x = 611,869.20 × 123,522.40
  4. Step 4: Simplify right side
    407,855.20x = 75,579,552,070.08
  5. Step 5: Solve for x
    x = 75,579,552,070.08/407,855.20
  6. Step 6: Final answer
    x = 185,309.77

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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.