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Finding the Fourth Proportional to 280,344.71, 420,581.46 and 80,666.75

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Solution

The fourth proportional to 280,344.71, 420,581.46 and 80,666.75 is: 121,018.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,344.71 : 420,581.46 = 80,666.75 : x
  2. Step 2: Convert to fraction form
    280,344.71/420,581.46 = 80,666.75/x
  3. Step 3: Cross multiply
    280,344.71x = 420,581.46 × 80,666.75
  4. Step 4: Simplify right side
    280,344.71x = 33,926,937,385.55
  5. Step 5: Solve for x
    x = 33,926,937,385.55/280,344.71
  6. Step 6: Final answer
    x = 121,018.65

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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.