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Finding the Fourth Proportional to 278,722.60, 417,911.10 and 160,335.40

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Solution

The fourth proportional to 278,722.60, 417,911.10 and 160,335.40 is: 240,403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,722.60 : 417,911.10 = 160,335.40 : x
  2. Step 2: Convert to fraction form
    278,722.60/417,911.10 = 160,335.40/x
  3. Step 3: Cross multiply
    278,722.60x = 417,911.10 × 160,335.40
  4. Step 4: Simplify right side
    278,722.60x = 67,005,943,382.94
  5. Step 5: Solve for x
    x = 67,005,943,382.94/278,722.60
  6. Step 6: Final answer
    x = 240,403.70

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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.