Home / 658,938.80-986,221.20-478,511.30

Finding the Fourth Proportional to 658,938.80, 986,221.20 and 478,511.30

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Solution

The fourth proportional to 658,938.80, 986,221.20 and 478,511.30 is: 716,178.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,938.80 : 986,221.20 = 478,511.30 : x
  2. Step 2: Convert to fraction form
    658,938.80/986,221.20 = 478,511.30/x
  3. Step 3: Cross multiply
    658,938.80x = 986,221.20 × 478,511.30
  4. Step 4: Simplify right side
    658,938.80x = 471,917,988,499.56
  5. Step 5: Solve for x
    x = 471,917,988,499.56/658,938.80
  6. Step 6: Final answer
    x = 716,178.78

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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.