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Finding the Fourth Proportional to 312,345.60, 431,031.72 and 169,104.48

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Solution

The fourth proportional to 312,345.60, 431,031.72 and 169,104.48 is: 233,361.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,345.60 : 431,031.72 = 169,104.48 : x
  2. Step 2: Convert to fraction form
    312,345.60/431,031.72 = 169,104.48/x
  3. Step 3: Cross multiply
    312,345.60x = 431,031.72 × 169,104.48
  4. Step 4: Simplify right side
    312,345.60x = 72,889,394,874.11
  5. Step 5: Solve for x
    x = 72,889,394,874.11/312,345.60
  6. Step 6: Final answer
    x = 233,361.36

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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.