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Finding the Fourth Proportional to 426,999.60, 639,808.20 and 268,945.20

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Solution

The fourth proportional to 426,999.60, 639,808.20 and 268,945.20 is: 402,982.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,999.60 : 639,808.20 = 268,945.20 : x
  2. Step 2: Convert to fraction form
    426,999.60/639,808.20 = 268,945.20/x
  3. Step 3: Cross multiply
    426,999.60x = 639,808.20 × 268,945.20
  4. Step 4: Simplify right side
    426,999.60x = 172,073,344,310.64
  5. Step 5: Solve for x
    x = 172,073,344,310.64/426,999.60
  6. Step 6: Final answer
    x = 402,982.45

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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.