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Finding the Fourth Proportional to 278,464.80, 417,697.20 and 91,476.30

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Solution

The fourth proportional to 278,464.80, 417,697.20 and 91,476.30 is: 137,214.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,464.80 : 417,697.20 = 91,476.30 : x
  2. Step 2: Convert to fraction form
    278,464.80/417,697.20 = 91,476.30/x
  3. Step 3: Cross multiply
    278,464.80x = 417,697.20 × 91,476.30
  4. Step 4: Simplify right side
    278,464.80x = 38,209,394,376.36
  5. Step 5: Solve for x
    x = 38,209,394,376.36/278,464.80
  6. Step 6: Final answer
    x = 137,214.45

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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.