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Finding the Fourth Proportional to 315,959.40, 436,024.08 and 172,719.41

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Solution

The fourth proportional to 315,959.40, 436,024.08 and 172,719.41 is: 238,352.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,959.40 : 436,024.08 = 172,719.41 : x
  2. Step 2: Convert to fraction form
    315,959.40/436,024.08 = 172,719.41/x
  3. Step 3: Cross multiply
    315,959.40x = 436,024.08 × 172,719.41
  4. Step 4: Simplify right side
    315,959.40x = 75,309,819,663.27
  5. Step 5: Solve for x
    x = 75,309,819,663.27/315,959.40
  6. Step 6: Final answer
    x = 238,352.84

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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.