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Finding the Fourth Proportional to 558,980.80, 838,471.20 and 543,428.80

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Solution

The fourth proportional to 558,980.80, 838,471.20 and 543,428.80 is: 815,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,980.80 : 838,471.20 = 543,428.80 : x
  2. Step 2: Convert to fraction form
    558,980.80/838,471.20 = 543,428.80/x
  3. Step 3: Cross multiply
    558,980.80x = 838,471.20 × 543,428.80
  4. Step 4: Simplify right side
    558,980.80x = 455,649,398,050.56
  5. Step 5: Solve for x
    x = 455,649,398,050.56/558,980.80
  6. Step 6: Final answer
    x = 815,143.20

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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.