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Finding the Fourth Proportional to 885,818, 1,328,727 and 287,279.84

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Solution

The fourth proportional to 885,818, 1,328,727 and 287,279.84 is: 430,919.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,818 : 1,328,727 = 287,279.84 : x
  2. Step 2: Convert to fraction form
    885,818/1,328,727 = 287,279.84/x
  3. Step 3: Cross multiply
    885,818x = 1,328,727 × 287,279.84
  4. Step 4: Simplify right side
    885,818x = 381,716,479,963.68
  5. Step 5: Solve for x
    x = 381,716,479,963.68/885,818
  6. Step 6: Final answer
    x = 430,919.76

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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.