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Finding the Fourth Proportional to 391,332.80, 586,860.93 and 186,143.30

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Solution

The fourth proportional to 391,332.80, 586,860.93 and 186,143.30 is: 279,149.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,332.80 : 586,860.93 = 186,143.30 : x
  2. Step 2: Convert to fraction form
    391,332.80/586,860.93 = 186,143.30/x
  3. Step 3: Cross multiply
    391,332.80x = 586,860.93 × 186,143.30
  4. Step 4: Simplify right side
    391,332.80x = 109,240,227,216.96
  5. Step 5: Solve for x
    x = 109,240,227,216.96/391,332.80
  6. Step 6: Final answer
    x = 279,149.18

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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.