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Finding the Fourth Proportional to 408,139.70, 612,209.55 and 266,422.10

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Solution

The fourth proportional to 408,139.70, 612,209.55 and 266,422.10 is: 399,633.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,139.70 : 612,209.55 = 266,422.10 : x
  2. Step 2: Convert to fraction form
    408,139.70/612,209.55 = 266,422.10/x
  3. Step 3: Cross multiply
    408,139.70x = 612,209.55 × 266,422.10
  4. Step 4: Simplify right side
    408,139.70x = 163,106,153,951.06
  5. Step 5: Solve for x
    x = 163,106,153,951.06/408,139.70
  6. Step 6: Final answer
    x = 399,633.15

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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.