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Finding the Fourth Proportional to 278,941.68, 418,590.72 and 101,431.80

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Solution

The fourth proportional to 278,941.68, 418,590.72 and 101,431.80 is: 152,212.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,941.68 : 418,590.72 = 101,431.80 : x
  2. Step 2: Convert to fraction form
    278,941.68/418,590.72 = 101,431.80/x
  3. Step 3: Cross multiply
    278,941.68x = 418,590.72 × 101,431.80
  4. Step 4: Simplify right side
    278,941.68x = 42,458,410,192.90
  5. Step 5: Solve for x
    x = 42,458,410,192.90/278,941.68
  6. Step 6: Final answer
    x = 152,212.50

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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.