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Finding the Fourth Proportional to 559,405.80, 839,108.70 and 185,428.80

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Solution

The fourth proportional to 559,405.80, 839,108.70 and 185,428.80 is: 278,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,405.80 : 839,108.70 = 185,428.80 : x
  2. Step 2: Convert to fraction form
    559,405.80/839,108.70 = 185,428.80/x
  3. Step 3: Cross multiply
    559,405.80x = 839,108.70 × 185,428.80
  4. Step 4: Simplify right side
    559,405.80x = 155,594,919,310.56
  5. Step 5: Solve for x
    x = 155,594,919,310.56/559,405.80
  6. Step 6: Final answer
    x = 278,143.20

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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.