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Finding the Fourth Proportional to 408,541.65, 612,910.92 and 128,058.90

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Solution

The fourth proportional to 408,541.65, 612,910.92 and 128,058.90 is: 192,119.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,541.65 : 612,910.92 = 128,058.90 : x
  2. Step 2: Convert to fraction form
    408,541.65/612,910.92 = 128,058.90/x
  3. Step 3: Cross multiply
    408,541.65x = 612,910.92 × 128,058.90
  4. Step 4: Simplify right side
    408,541.65x = 78,488,695,434.55
  5. Step 5: Solve for x
    x = 78,488,695,434.55/408,541.65
  6. Step 6: Final answer
    x = 192,119.20

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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.