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Finding the Fourth Proportional to 278,539.60, 417,809.40 and 260,824.90

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Solution

The fourth proportional to 278,539.60, 417,809.40 and 260,824.90 is: 391,237.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,539.60 : 417,809.40 = 260,824.90 : x
  2. Step 2: Convert to fraction form
    278,539.60/417,809.40 = 260,824.90/x
  3. Step 3: Cross multiply
    278,539.60x = 417,809.40 × 260,824.90
  4. Step 4: Simplify right side
    278,539.60x = 108,975,094,974.06
  5. Step 5: Solve for x
    x = 108,975,094,974.06/278,539.60
  6. Step 6: Final answer
    x = 391,237.35

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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.