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Finding the Fourth Proportional to 643,067.85, 887,369.67 and 371,223.32

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Solution

The fourth proportional to 643,067.85, 887,369.67 and 371,223.32 is: 512,251.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,067.85 : 887,369.67 = 371,223.32 : x
  2. Step 2: Convert to fraction form
    643,067.85/887,369.67 = 371,223.32/x
  3. Step 3: Cross multiply
    643,067.85x = 887,369.67 × 371,223.32
  4. Step 4: Simplify right side
    643,067.85x = 329,412,310,527.86
  5. Step 5: Solve for x
    x = 329,412,310,527.86/643,067.85
  6. Step 6: Final answer
    x = 512,251.25

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1.5x scale

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.