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Finding the Fourth Proportional to 506,890.80, 699,436.08 and 280,535.76

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Solution

The fourth proportional to 506,890.80, 699,436.08 and 280,535.76 is: 387,098.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,890.80 : 699,436.08 = 280,535.76 : x
  2. Step 2: Convert to fraction form
    506,890.80/699,436.08 = 280,535.76/x
  3. Step 3: Cross multiply
    506,890.80x = 699,436.08 × 280,535.76
  4. Step 4: Simplify right side
    506,890.80x = 196,216,832,274.22
  5. Step 5: Solve for x
    x = 196,216,832,274.22/506,890.80
  6. Step 6: Final answer
    x = 387,098.82

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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.