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Finding the Fourth Proportional to 558,972.80, 838,459.20 and 543,420.80

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Solution

The fourth proportional to 558,972.80, 838,459.20 and 543,420.80 is: 815,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,972.80 : 838,459.20 = 543,420.80 : x
  2. Step 2: Convert to fraction form
    558,972.80/838,459.20 = 543,420.80/x
  3. Step 3: Cross multiply
    558,972.80x = 838,459.20 × 543,420.80
  4. Step 4: Simplify right side
    558,972.80x = 455,636,169,231.36
  5. Step 5: Solve for x
    x = 455,636,169,231.36/558,972.80
  6. Step 6: Final answer
    x = 815,131.20

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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.