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Finding the Fourth Proportional to 280,539.34, 420,863.91 and 103,047.73

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Solution

The fourth proportional to 280,539.34, 420,863.91 and 103,047.73 is: 154,591.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,539.34 : 420,863.91 = 103,047.73 : x
  2. Step 2: Convert to fraction form
    280,539.34/420,863.91 = 103,047.73/x
  3. Step 3: Cross multiply
    280,539.34x = 420,863.91 × 103,047.73
  4. Step 4: Simplify right side
    280,539.34x = 43,369,070,564.42
  5. Step 5: Solve for x
    x = 43,369,070,564.42/280,539.34
  6. Step 6: Final answer
    x = 154,591.76

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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.