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Finding the Fourth Proportional to 259,726.60, 388,812.30 and 154,491.40

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Solution

The fourth proportional to 259,726.60, 388,812.30 and 154,491.40 is: 231,274.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,726.60 : 388,812.30 = 154,491.40 : x
  2. Step 2: Convert to fraction form
    259,726.60/388,812.30 = 154,491.40/x
  3. Step 3: Cross multiply
    259,726.60x = 388,812.30 × 154,491.40
  4. Step 4: Simplify right side
    259,726.60x = 60,068,156,564.22
  5. Step 5: Solve for x
    x = 60,068,156,564.22/259,726.60
  6. Step 6: Final answer
    x = 231,274.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.