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Finding the Fourth Proportional to 558,740.80, 838,111.20 and 221,861.80

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Solution

The fourth proportional to 558,740.80, 838,111.20 and 221,861.80 is: 332,792.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,740.80 : 838,111.20 = 221,861.80 : x
  2. Step 2: Convert to fraction form
    558,740.80/838,111.20 = 221,861.80/x
  3. Step 3: Cross multiply
    558,740.80x = 838,111.20 × 221,861.80
  4. Step 4: Simplify right side
    558,740.80x = 185,944,859,432.16
  5. Step 5: Solve for x
    x = 185,944,859,432.16/558,740.80
  6. Step 6: Final answer
    x = 332,792.70

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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.