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Finding the Fourth Proportional to 308,331.36, 425,565.86 and 187,447

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Solution

The fourth proportional to 308,331.36, 425,565.86 and 187,447 is: 258,718.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,331.36 : 425,565.86 = 187,447 : x
  2. Step 2: Convert to fraction form
    308,331.36/425,565.86 = 187,447/x
  3. Step 3: Cross multiply
    308,331.36x = 425,565.86 × 187,447
  4. Step 4: Simplify right side
    308,331.36x = 79,771,043,759.42
  5. Step 5: Solve for x
    x = 79,771,043,759.42/308,331.36
  6. Step 6: Final answer
    x = 258,718.55

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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.