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Finding the Fourth Proportional to 308,439.34, 425,643.86 and 172,473.55

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Solution

The fourth proportional to 308,439.34, 425,643.86 and 172,473.55 is: 238,012.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,439.34 : 425,643.86 = 172,473.55 : x
  2. Step 2: Convert to fraction form
    308,439.34/425,643.86 = 172,473.55/x
  3. Step 3: Cross multiply
    308,439.34x = 425,643.86 × 172,473.55
  4. Step 4: Simplify right side
    308,439.34x = 73,412,309,331.22
  5. Step 5: Solve for x
    x = 73,412,309,331.22/308,439.34
  6. Step 6: Final answer
    x = 238,012.14

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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.