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Finding the Fourth Proportional to 287,839.80, 431,370.90 and 192,799.80

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Solution

The fourth proportional to 287,839.80, 431,370.90 and 192,799.80 is: 288,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,839.80 : 431,370.90 = 192,799.80 : x
  2. Step 2: Convert to fraction form
    287,839.80/431,370.90 = 192,799.80/x
  3. Step 3: Cross multiply
    287,839.80x = 431,370.90 × 192,799.80
  4. Step 4: Simplify right side
    287,839.80x = 83,168,223,245.82
  5. Step 5: Solve for x
    x = 83,168,223,245.82/287,839.80
  6. Step 6: Final answer
    x = 288,939.28

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1.5x scale

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.