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Finding the Fourth Proportional to 391,332.54, 586,860.56 and 186,143.04

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Solution

The fourth proportional to 391,332.54, 586,860.56 and 186,143.04 is: 279,148.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,332.54 : 586,860.56 = 186,143.04 : x
  2. Step 2: Convert to fraction form
    391,332.54/586,860.56 = 186,143.04/x
  3. Step 3: Cross multiply
    391,332.54x = 586,860.56 × 186,143.04
  4. Step 4: Simplify right side
    391,332.54x = 109,240,008,694.50
  5. Step 5: Solve for x
    x = 109,240,008,694.50/391,332.54
  6. Step 6: Final answer
    x = 279,148.80

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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.