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Finding the Fourth Proportional to 312,598.98, 431,387.05 and 169,359.03

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Solution

The fourth proportional to 312,598.98, 431,387.05 and 169,359.03 is: 233,715.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,598.98 : 431,387.05 = 169,359.03 : x
  2. Step 2: Convert to fraction form
    312,598.98/431,387.05 = 169,359.03/x
  3. Step 3: Cross multiply
    312,598.98x = 431,387.05 × 169,359.03
  4. Step 4: Simplify right side
    312,598.98x = 73,059,292,342.56
  5. Step 5: Solve for x
    x = 73,059,292,342.56/312,598.98
  6. Step 6: Final answer
    x = 233,715.71

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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.