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Finding the Fourth Proportional to 278,452.80, 384,232.98 and 155,928.10

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Solution

The fourth proportional to 278,452.80, 384,232.98 and 155,928.10 is: 215,162.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,452.80 : 384,232.98 = 155,928.10 : x
  2. Step 2: Convert to fraction form
    278,452.80/384,232.98 = 155,928.10/x
  3. Step 3: Cross multiply
    278,452.80x = 384,232.98 × 155,928.10
  4. Step 4: Simplify right side
    278,452.80x = 59,912,718,528.74
  5. Step 5: Solve for x
    x = 59,912,718,528.74/278,452.80
  6. Step 6: Final answer
    x = 215,162.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.