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Finding the Fourth Proportional to 980,670.80, 1,472,561.40 and 744,280.40

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Solution

The fourth proportional to 980,670.80, 1,472,561.40 and 744,280.40 is: 1,117,600.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,670.80 : 1,472,561.40 = 744,280.40 : x
  2. Step 2: Convert to fraction form
    980,670.80/1,472,561.40 = 744,280.40/x
  3. Step 3: Cross multiply
    980,670.80x = 1,472,561.40 × 744,280.40
  4. Step 4: Simplify right side
    980,670.80x = 1,095,998,587,816.56
  5. Step 5: Solve for x
    x = 1,095,998,587,816.56/980,670.80
  6. Step 6: Final answer
    x = 1,117,600.92

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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.