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Finding the Fourth Proportional to 308,841.96, 426,209.12 and 172,872.52

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Solution

The fourth proportional to 308,841.96, 426,209.12 and 172,872.52 is: 238,568.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,841.96 : 426,209.12 = 172,872.52 : x
  2. Step 2: Convert to fraction form
    308,841.96/426,209.12 = 172,872.52/x
  3. Step 3: Cross multiply
    308,841.96x = 426,209.12 × 172,872.52
  4. Step 4: Simplify right side
    308,841.96x = 73,679,844,621.38
  5. Step 5: Solve for x
    x = 73,679,844,621.38/308,841.96
  6. Step 6: Final answer
    x = 238,568.12

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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.