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Finding the Fourth Proportional to 312,625.72, 431,422.02 and 169,385.72

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Solution

The fourth proportional to 312,625.72, 431,422.02 and 169,385.72 is: 233,751.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,625.72 : 431,422.02 = 169,385.72 : x
  2. Step 2: Convert to fraction form
    312,625.72/431,422.02 = 169,385.72/x
  3. Step 3: Cross multiply
    312,625.72x = 431,422.02 × 169,385.72
  4. Step 4: Simplify right side
    312,625.72x = 73,076,730,560.11
  5. Step 5: Solve for x
    x = 73,076,730,560.11/312,625.72
  6. Step 6: Final answer
    x = 233,751.50

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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.