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Finding the Fourth Proportional to 312,755.28, 431,600.58 and 169,513.80

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Solution

The fourth proportional to 312,755.28, 431,600.58 and 169,513.80 is: 233,928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,755.28 : 431,600.58 = 169,513.80 : x
  2. Step 2: Convert to fraction form
    312,755.28/431,600.58 = 169,513.80/x
  3. Step 3: Cross multiply
    312,755.28x = 431,600.58 × 169,513.80
  4. Step 4: Simplify right side
    312,755.28x = 73,162,254,398.00
  5. Step 5: Solve for x
    x = 73,162,254,398.00/312,755.28
  6. Step 6: Final answer
    x = 233,928.12

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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.