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Finding the Fourth Proportional to 399,209.20, 599,251.20 and 249,618.40

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Solution

The fourth proportional to 399,209.20, 599,251.20 and 249,618.40 is: 374,701.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,209.20 : 599,251.20 = 249,618.40 : x
  2. Step 2: Convert to fraction form
    399,209.20/599,251.20 = 249,618.40/x
  3. Step 3: Cross multiply
    399,209.20x = 599,251.20 × 249,618.40
  4. Step 4: Simplify right side
    399,209.20x = 149,584,125,742.08
  5. Step 5: Solve for x
    x = 149,584,125,742.08/399,209.20
  6. Step 6: Final answer
    x = 374,701.10

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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.