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Finding the Fourth Proportional to 278,449.20, 417,673.80 and 91,479.60

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Solution

The fourth proportional to 278,449.20, 417,673.80 and 91,479.60 is: 137,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,449.20 : 417,673.80 = 91,479.60 : x
  2. Step 2: Convert to fraction form
    278,449.20/417,673.80 = 91,479.60/x
  3. Step 3: Cross multiply
    278,449.20x = 417,673.80 × 91,479.60
  4. Step 4: Simplify right side
    278,449.20x = 38,208,632,154.48
  5. Step 5: Solve for x
    x = 38,208,632,154.48/278,449.20
  6. Step 6: Final answer
    x = 137,219.40

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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.