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Finding the Fourth Proportional to 660,919.46, 912,067.17 and 359,113.46

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Solution

The fourth proportional to 660,919.46, 912,067.17 and 359,113.46 is: 495,575.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,919.46 : 912,067.17 = 359,113.46 : x
  2. Step 2: Convert to fraction form
    660,919.46/912,067.17 = 359,113.46/x
  3. Step 3: Cross multiply
    660,919.46x = 912,067.17 × 359,113.46
  4. Step 4: Simplify right side
    660,919.46x = 327,535,597,171.11
  5. Step 5: Solve for x
    x = 327,535,597,171.11/660,919.46
  6. Step 6: Final answer
    x = 495,575.66

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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.