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Finding the Fourth Proportional to 1,279,372.76, 1,919,068.06 and 878,799.42

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Solution

The fourth proportional to 1,279,372.76, 1,919,068.06 and 878,799.42 is: 1,318,205.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,372.76 : 1,919,068.06 = 878,799.42 : x
  2. Step 2: Convert to fraction form
    1,279,372.76/1,919,068.06 = 878,799.42/x
  3. Step 3: Cross multiply
    1,279,372.76x = 1,919,068.06 × 878,799.42
  4. Step 4: Simplify right side
    1,279,372.76x = 1,686,475,898,068.53
  5. Step 5: Solve for x
    x = 1,686,475,898,068.53/1,279,372.76
  6. Step 6: Final answer
    x = 1,318,205.26

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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.