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Finding the Fourth Proportional to 315,967.20, 436,034.76 and 172,728.28

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Solution

The fourth proportional to 315,967.20, 436,034.76 and 172,728.28 is: 238,365.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,967.20 : 436,034.76 = 172,728.28 : x
  2. Step 2: Convert to fraction form
    315,967.20/436,034.76 = 172,728.28/x
  3. Step 3: Cross multiply
    315,967.20x = 436,034.76 × 172,728.28
  4. Step 4: Simplify right side
    315,967.20x = 75,315,534,115.01
  5. Step 5: Solve for x
    x = 75,315,534,115.01/315,967.20
  6. Step 6: Final answer
    x = 238,365.04

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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.