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Finding the Fourth Proportional to 410,006.20, 615,009.30 and 251,721.40

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Solution

The fourth proportional to 410,006.20, 615,009.30 and 251,721.40 is: 377,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,006.20 : 615,009.30 = 251,721.40 : x
  2. Step 2: Convert to fraction form
    410,006.20/615,009.30 = 251,721.40/x
  3. Step 3: Cross multiply
    410,006.20x = 615,009.30 × 251,721.40
  4. Step 4: Simplify right side
    410,006.20x = 154,811,002,009.02
  5. Step 5: Solve for x
    x = 154,811,002,009.02/410,006.20
  6. Step 6: Final answer
    x = 377,582.10

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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.