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Finding the Fourth Proportional to 317,769.61, 438,520.56 and 172,574.37

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Solution

The fourth proportional to 317,769.61, 438,520.56 and 172,574.37 is: 238,151.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,769.61 : 438,520.56 = 172,574.37 : x
  2. Step 2: Convert to fraction form
    317,769.61/438,520.56 = 172,574.37/x
  3. Step 3: Cross multiply
    317,769.61x = 438,520.56 × 172,574.37
  4. Step 4: Simplify right side
    317,769.61x = 75,677,409,374.05
  5. Step 5: Solve for x
    x = 75,677,409,374.05/317,769.61
  6. Step 6: Final answer
    x = 238,151.82

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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.