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Finding the Fourth Proportional to 288,378.72, 431,726.28 and 192,422.88

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Solution

The fourth proportional to 288,378.72, 431,726.28 and 192,422.88 is: 288,072.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,378.72 : 431,726.28 = 192,422.88 : x
  2. Step 2: Convert to fraction form
    288,378.72/431,726.28 = 192,422.88/x
  3. Step 3: Cross multiply
    288,378.72x = 431,726.28 × 192,422.88
  4. Step 4: Simplify right side
    288,378.72x = 83,074,014,169.29
  5. Step 5: Solve for x
    x = 83,074,014,169.29/288,378.72
  6. Step 6: Final answer
    x = 288,072.62

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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.