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Finding the Fourth Proportional to 280,377.75, 420,566.64 and 83,385.75

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Solution

The fourth proportional to 280,377.75, 420,566.64 and 83,385.75 is: 125,078.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,377.75 : 420,566.64 = 83,385.75 : x
  2. Step 2: Convert to fraction form
    280,377.75/420,566.64 = 83,385.75/x
  3. Step 3: Cross multiply
    280,377.75x = 420,566.64 × 83,385.75
  4. Step 4: Simplify right side
    280,377.75x = 35,069,264,701.38
  5. Step 5: Solve for x
    x = 35,069,264,701.38/280,377.75
  6. Step 6: Final answer
    x = 125,078.63

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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.