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Finding the Fourth Proportional to 315,279.16, 435,086.34 and 172,042.36

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Solution

The fourth proportional to 315,279.16, 435,086.34 and 172,042.36 is: 237,419.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,279.16 : 435,086.34 = 172,042.36 : x
  2. Step 2: Convert to fraction form
    315,279.16/435,086.34 = 172,042.36/x
  3. Step 3: Cross multiply
    315,279.16x = 435,086.34 × 172,042.36
  4. Step 4: Simplify right side
    315,279.16x = 74,853,280,737.36
  5. Step 5: Solve for x
    x = 74,853,280,737.36/315,279.16
  6. Step 6: Final answer
    x = 237,419.06

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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.