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Finding the Fourth Proportional to 408,139.92, 612,216.06 and 155,434.40

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Solution

The fourth proportional to 408,139.92, 612,216.06 and 155,434.40 is: 233,153.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,139.92 : 612,216.06 = 155,434.40 : x
  2. Step 2: Convert to fraction form
    408,139.92/612,216.06 = 155,434.40/x
  3. Step 3: Cross multiply
    408,139.92x = 612,216.06 × 155,434.40
  4. Step 4: Simplify right side
    408,139.92x = 95,159,435,956.46
  5. Step 5: Solve for x
    x = 95,159,435,956.46/408,139.92
  6. Step 6: Final answer
    x = 233,153.95

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1.5x scale

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.