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Finding the Fourth Proportional to 315,872.48, 435,904.80 and 172,634.24

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Solution

The fourth proportional to 315,872.48, 435,904.80 and 172,634.24 is: 238,235.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,872.48 : 435,904.80 = 172,634.24 : x
  2. Step 2: Convert to fraction form
    315,872.48/435,904.80 = 172,634.24/x
  3. Step 3: Cross multiply
    315,872.48x = 435,904.80 × 172,634.24
  4. Step 4: Simplify right side
    315,872.48x = 75,252,093,860.35
  5. Step 5: Solve for x
    x = 75,252,093,860.35/315,872.48
  6. Step 6: Final answer
    x = 238,235.68

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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.