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Finding the Fourth Proportional to 308,217.91, 425,471.69 and 187,397.80

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Solution

The fourth proportional to 308,217.91, 425,471.69 and 187,397.80 is: 258,688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,217.91 : 425,471.69 = 187,397.80 : x
  2. Step 2: Convert to fraction form
    308,217.91/425,471.69 = 187,397.80/x
  3. Step 3: Cross multiply
    308,217.91x = 425,471.69 × 187,397.80
  4. Step 4: Simplify right side
    308,217.91x = 79,732,459,412.26
  5. Step 5: Solve for x
    x = 79,732,459,412.26/308,217.91
  6. Step 6: Final answer
    x = 258,688.60

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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.