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Finding the Fourth Proportional to 559,990.80, 839,986.20 and 186,013.80

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Solution

The fourth proportional to 559,990.80, 839,986.20 and 186,013.80 is: 279,020.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,990.80 : 839,986.20 = 186,013.80 : x
  2. Step 2: Convert to fraction form
    559,990.80/839,986.20 = 186,013.80/x
  3. Step 3: Cross multiply
    559,990.80x = 839,986.20 × 186,013.80
  4. Step 4: Simplify right side
    559,990.80x = 156,249,025,009.56
  5. Step 5: Solve for x
    x = 156,249,025,009.56/559,990.80
  6. Step 6: Final answer
    x = 279,020.70

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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.