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Finding the Fourth Proportional to 315,880.20, 435,908.20 and 172,641.26

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Solution

The fourth proportional to 315,880.20, 435,908.20 and 172,641.26 is: 238,241.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,880.20 : 435,908.20 = 172,641.26 : x
  2. Step 2: Convert to fraction form
    315,880.20/435,908.20 = 172,641.26/x
  3. Step 3: Cross multiply
    315,880.20x = 435,908.20 × 172,641.26
  4. Step 4: Simplify right side
    315,880.20x = 75,255,740,029.13
  5. Step 5: Solve for x
    x = 75,255,740,029.13/315,880.20
  6. Step 6: Final answer
    x = 238,241.40

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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.