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Finding the Fourth Proportional to 426,207.20, 639,080.40 and 176,914.40

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Solution

The fourth proportional to 426,207.20, 639,080.40 and 176,914.40 is: 265,275.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,207.20 : 639,080.40 = 176,914.40 : x
  2. Step 2: Convert to fraction form
    426,207.20/639,080.40 = 176,914.40/x
  3. Step 3: Cross multiply
    426,207.20x = 639,080.40 × 176,914.40
  4. Step 4: Simplify right side
    426,207.20x = 113,062,525,517.76
  5. Step 5: Solve for x
    x = 113,062,525,517.76/426,207.20
  6. Step 6: Final answer
    x = 265,275.96

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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.