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Finding the Fourth Proportional to 426,138.46, 639,041.56 and 159,753.63

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Solution

The fourth proportional to 426,138.46, 639,041.56 and 159,753.63 is: 239,568.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,138.46 : 639,041.56 = 159,753.63 : x
  2. Step 2: Convert to fraction form
    426,138.46/639,041.56 = 159,753.63/x
  3. Step 3: Cross multiply
    426,138.46x = 639,041.56 × 159,753.63
  4. Step 4: Simplify right side
    426,138.46x = 102,089,208,930.86
  5. Step 5: Solve for x
    x = 102,089,208,930.86/426,138.46
  6. Step 6: Final answer
    x = 239,568.17

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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.