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Finding the Fourth Proportional to 426,407.92, 639,495.12 and 160,147.84

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Solution

The fourth proportional to 426,407.92, 639,495.12 and 160,147.84 is: 240,177.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,407.92 : 639,495.12 = 160,147.84 : x
  2. Step 2: Convert to fraction form
    426,407.92/639,495.12 = 160,147.84/x
  3. Step 3: Cross multiply
    426,407.92x = 639,495.12 × 160,147.84
  4. Step 4: Simplify right side
    426,407.92x = 102,413,762,158.54
  5. Step 5: Solve for x
    x = 102,413,762,158.54/426,407.92
  6. Step 6: Final answer
    x = 240,177.91

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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.