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Finding the Fourth Proportional to 425,739.20, 638,378.40 and 176,446.40

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Solution

The fourth proportional to 425,739.20, 638,378.40 and 176,446.40 is: 264,574.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,739.20 : 638,378.40 = 176,446.40 : x
  2. Step 2: Convert to fraction form
    425,739.20/638,378.40 = 176,446.40/x
  3. Step 3: Cross multiply
    425,739.20x = 638,378.40 × 176,446.40
  4. Step 4: Simplify right side
    425,739.20x = 112,639,570,517.76
  5. Step 5: Solve for x
    x = 112,639,570,517.76/425,739.20
  6. Step 6: Final answer
    x = 264,574.11

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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.