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Finding the Fourth Proportional to 386,310.30, 579,465.45 and 173,077.80

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Solution

The fourth proportional to 386,310.30, 579,465.45 and 173,077.80 is: 259,616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,310.30 : 579,465.45 = 173,077.80 : x
  2. Step 2: Convert to fraction form
    386,310.30/579,465.45 = 173,077.80/x
  3. Step 3: Cross multiply
    386,310.30x = 579,465.45 × 173,077.80
  4. Step 4: Simplify right side
    386,310.30x = 100,292,605,262.01
  5. Step 5: Solve for x
    x = 100,292,605,262.01/386,310.30
  6. Step 6: Final answer
    x = 259,616.70

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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.