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Finding the Fourth Proportional to 386,045.70, 579,185.73 and 186,328.86

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Solution

The fourth proportional to 386,045.70, 579,185.73 and 186,328.86 is: 279,549.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,045.70 : 579,185.73 = 186,328.86 : x
  2. Step 2: Convert to fraction form
    386,045.70/579,185.73 = 186,328.86/x
  3. Step 3: Cross multiply
    386,045.70x = 579,185.73 × 186,328.86
  4. Step 4: Simplify right side
    386,045.70x = 107,919,016,799.17
  5. Step 5: Solve for x
    x = 107,919,016,799.17/386,045.70
  6. Step 6: Final answer
    x = 279,549.85

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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.