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Finding the Fourth Proportional to 312,349.92, 431,042.28 and 169,109.94

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Solution

The fourth proportional to 312,349.92, 431,042.28 and 169,109.94 is: 233,371.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,349.92 : 431,042.28 = 169,109.94 : x
  2. Step 2: Convert to fraction form
    312,349.92/431,042.28 = 169,109.94/x
  3. Step 3: Cross multiply
    312,349.92x = 431,042.28 × 169,109.94
  4. Step 4: Simplify right side
    312,349.92x = 72,893,534,108.26
  5. Step 5: Solve for x
    x = 72,893,534,108.26/312,349.92
  6. Step 6: Final answer
    x = 233,371.39

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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.