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Finding the Fourth Proportional to 426,031.20, 638,803.80 and 159,800.40

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Solution

The fourth proportional to 426,031.20, 638,803.80 and 159,800.40 is: 239,609.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,031.20 : 638,803.80 = 159,800.40 : x
  2. Step 2: Convert to fraction form
    426,031.20/638,803.80 = 159,800.40/x
  3. Step 3: Cross multiply
    426,031.20x = 638,803.80 × 159,800.40
  4. Step 4: Simplify right side
    426,031.20x = 102,081,102,761.52
  5. Step 5: Solve for x
    x = 102,081,102,761.52/426,031.20
  6. Step 6: Final answer
    x = 239,609.45

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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.