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Finding the Fourth Proportional to 317,864.54, 438,657.72 and 172,673.03

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Solution

The fourth proportional to 317,864.54, 438,657.72 and 172,673.03 is: 238,291.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,864.54 : 438,657.72 = 172,673.03 : x
  2. Step 2: Convert to fraction form
    317,864.54/438,657.72 = 172,673.03/x
  3. Step 3: Cross multiply
    317,864.54x = 438,657.72 × 172,673.03
  4. Step 4: Simplify right side
    317,864.54x = 75,744,358,094.41
  5. Step 5: Solve for x
    x = 75,744,358,094.41/317,864.54
  6. Step 6: Final answer
    x = 238,291.31

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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.