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Finding the Fourth Proportional to 308,154.78, 425,384.56 and 187,334.66

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Solution

The fourth proportional to 308,154.78, 425,384.56 and 187,334.66 is: 258,601.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,154.78 : 425,384.56 = 187,334.66 : x
  2. Step 2: Convert to fraction form
    308,154.78/425,384.56 = 187,334.66/x
  3. Step 3: Cross multiply
    308,154.78x = 425,384.56 × 187,334.66
  4. Step 4: Simplify right side
    308,154.78x = 79,689,271,916.85
  5. Step 5: Solve for x
    x = 79,689,271,916.85/308,154.78
  6. Step 6: Final answer
    x = 258,601.45

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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.