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Finding the Fourth Proportional to 312,665.33, 431,479.64 and 169,425.68

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Solution

The fourth proportional to 312,665.33, 431,479.64 and 169,425.68 is: 233,808.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,665.33 : 431,479.64 = 169,425.68 : x
  2. Step 2: Convert to fraction form
    312,665.33/431,479.64 = 169,425.68/x
  3. Step 3: Cross multiply
    312,665.33x = 431,479.64 × 169,425.68
  4. Step 4: Simplify right side
    312,665.33x = 73,103,729,679.32
  5. Step 5: Solve for x
    x = 73,103,729,679.32/312,665.33
  6. Step 6: Final answer
    x = 233,808.24

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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.