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Finding the Fourth Proportional to 359,199.95, 495,660.87 and 221,357.43

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Solution

The fourth proportional to 359,199.95, 495,660.87 and 221,357.43 is: 305,451.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,199.95 : 495,660.87 = 221,357.43 : x
  2. Step 2: Convert to fraction form
    359,199.95/495,660.87 = 221,357.43/x
  3. Step 3: Cross multiply
    359,199.95x = 495,660.87 × 221,357.43
  4. Step 4: Simplify right side
    359,199.95x = 109,718,216,334.76
  5. Step 5: Solve for x
    x = 109,718,216,334.76/359,199.95
  6. Step 6: Final answer
    x = 305,451.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.