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Finding the Fourth Proportional to 310,691.38, 428,749.98 and 174,725.28

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Solution

The fourth proportional to 310,691.38, 428,749.98 and 174,725.28 is: 241,118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,691.38 : 428,749.98 = 174,725.28 : x
  2. Step 2: Convert to fraction form
    310,691.38/428,749.98 = 174,725.28/x
  3. Step 3: Cross multiply
    310,691.38x = 428,749.98 × 174,725.28
  4. Step 4: Simplify right side
    310,691.38x = 74,913,460,305.49
  5. Step 5: Solve for x
    x = 74,913,460,305.49/310,691.38
  6. Step 6: Final answer
    x = 241,118.57

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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.