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Finding the Fourth Proportional to 278,953.60, 418,430.40 and 166,979.20

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Solution

The fourth proportional to 278,953.60, 418,430.40 and 166,979.20 is: 250,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,953.60 : 418,430.40 = 166,979.20 : x
  2. Step 2: Convert to fraction form
    278,953.60/418,430.40 = 166,979.20/x
  3. Step 3: Cross multiply
    278,953.60x = 418,430.40 × 166,979.20
  4. Step 4: Simplify right side
    278,953.60x = 69,869,173,447.68
  5. Step 5: Solve for x
    x = 69,869,173,447.68/278,953.60
  6. Step 6: Final answer
    x = 250,468.80

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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.