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Finding the Fourth Proportional to 391,328.92, 586,661.82 and 154,838.44

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Solution

The fourth proportional to 391,328.92, 586,661.82 and 154,838.44 is: 232,126.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,328.92 : 586,661.82 = 154,838.44 : x
  2. Step 2: Convert to fraction form
    391,328.92/586,661.82 = 154,838.44/x
  3. Step 3: Cross multiply
    391,328.92x = 586,661.82 × 154,838.44
  4. Step 4: Simplify right side
    391,328.92x = 90,837,801,016.36
  5. Step 5: Solve for x
    x = 90,837,801,016.36/391,328.92
  6. Step 6: Final answer
    x = 232,126.47

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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.