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Finding the Fourth Proportional to 317,867.54, 438,661.86 and 172,676.04

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Solution

The fourth proportional to 317,867.54, 438,661.86 and 172,676.04 is: 238,295.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,867.54 : 438,661.86 = 172,676.04 : x
  2. Step 2: Convert to fraction form
    317,867.54/438,661.86 = 172,676.04/x
  3. Step 3: Cross multiply
    317,867.54x = 438,661.86 × 172,676.04
  4. Step 4: Simplify right side
    317,867.54x = 75,746,392,883.83
  5. Step 5: Solve for x
    x = 75,746,392,883.83/317,867.54
  6. Step 6: Final answer
    x = 238,295.46

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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.