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Finding the Fourth Proportional to 558,958.80, 838,438.20 and 402,661.20

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Solution

The fourth proportional to 558,958.80, 838,438.20 and 402,661.20 is: 603,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,958.80 : 838,438.20 = 402,661.20 : x
  2. Step 2: Convert to fraction form
    558,958.80/838,438.20 = 402,661.20/x
  3. Step 3: Cross multiply
    558,958.80x = 838,438.20 × 402,661.20
  4. Step 4: Simplify right side
    558,958.80x = 337,606,531,737.84
  5. Step 5: Solve for x
    x = 337,606,531,737.84/558,958.80
  6. Step 6: Final answer
    x = 603,991.80

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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.