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Finding the Fourth Proportional to 278,580.60, 417,870.90 and 260,865.90

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Solution

The fourth proportional to 278,580.60, 417,870.90 and 260,865.90 is: 391,298.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,580.60 : 417,870.90 = 260,865.90 : x
  2. Step 2: Convert to fraction form
    278,580.60/417,870.90 = 260,865.90/x
  3. Step 3: Cross multiply
    278,580.60x = 417,870.90 × 260,865.90
  4. Step 4: Simplify right side
    278,580.60x = 109,008,268,412.31
  5. Step 5: Solve for x
    x = 109,008,268,412.31/278,580.60
  6. Step 6: Final answer
    x = 391,298.85

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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.