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Finding the Fourth Proportional to 317,865.54, 438,659.10 and 172,674.03

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Solution

The fourth proportional to 317,865.54, 438,659.10 and 172,674.03 is: 238,292.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,865.54 : 438,659.10 = 172,674.03 : x
  2. Step 2: Convert to fraction form
    317,865.54/438,659.10 = 172,674.03/x
  3. Step 3: Cross multiply
    317,865.54x = 438,659.10 × 172,674.03
  4. Step 4: Simplify right side
    317,865.54x = 75,745,034,593.17
  5. Step 5: Solve for x
    x = 75,745,034,593.17/317,865.54
  6. Step 6: Final answer
    x = 238,292.69

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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.