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Finding the Fourth Proportional to 308,438.41, 425,642.60 and 172,472.62

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Solution

The fourth proportional to 308,438.41, 425,642.60 and 172,472.62 is: 238,010.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,438.41 : 425,642.60 = 172,472.62 : x
  2. Step 2: Convert to fraction form
    308,438.41/425,642.60 = 172,472.62/x
  3. Step 3: Cross multiply
    308,438.41x = 425,642.60 × 172,472.62
  4. Step 4: Simplify right side
    308,438.41x = 73,411,692,479.14
  5. Step 5: Solve for x
    x = 73,411,692,479.14/308,438.41
  6. Step 6: Final answer
    x = 238,010.87

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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.