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Finding the Fourth Proportional to 315,659.20, 435,620.16 and 172,432.60

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Solution

The fourth proportional to 315,659.20, 435,620.16 and 172,432.60 is: 237,962.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,659.20 : 435,620.16 = 172,432.60 : x
  2. Step 2: Convert to fraction form
    315,659.20/435,620.16 = 172,432.60/x
  3. Step 3: Cross multiply
    315,659.20x = 435,620.16 × 172,432.60
  4. Step 4: Simplify right side
    315,659.20x = 75,115,116,801.22
  5. Step 5: Solve for x
    x = 75,115,116,801.22/315,659.20
  6. Step 6: Final answer
    x = 237,962.70

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1.5x scale

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.