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Finding the Fourth Proportional to 312,728.67, 431,566.31 and 169,488.68

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Solution

The fourth proportional to 312,728.67, 431,566.31 and 169,488.68 is: 233,894.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,728.67 : 431,566.31 = 169,488.68 : x
  2. Step 2: Convert to fraction form
    312,728.67/431,566.31 = 169,488.68/x
  3. Step 3: Cross multiply
    312,728.67x = 431,566.31 × 169,488.68
  4. Step 4: Simplify right side
    312,728.67x = 73,145,602,480.26
  5. Step 5: Solve for x
    x = 73,145,602,480.26/312,728.67
  6. Step 6: Final answer
    x = 233,894.78

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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.