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Finding the Fourth Proportional to 308,499.84, 425,661.12 and 187,704

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Solution

The fourth proportional to 308,499.84, 425,661.12 and 187,704 is: 258,989.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,499.84 : 425,661.12 = 187,704 : x
  2. Step 2: Convert to fraction form
    308,499.84/425,661.12 = 187,704/x
  3. Step 3: Cross multiply
    308,499.84x = 425,661.12 × 187,704
  4. Step 4: Simplify right side
    308,499.84x = 79,898,294,868.48
  5. Step 5: Solve for x
    x = 79,898,294,868.48/308,499.84
  6. Step 6: Final answer
    x = 258,989.74

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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.