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Finding the Fourth Proportional to 1,278,828.97, 1,764,784.13 and 705,869.30

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Solution

The fourth proportional to 1,278,828.97, 1,764,784.13 and 705,869.30 is: 974,099.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,828.97 : 1,764,784.13 = 705,869.30 : x
  2. Step 2: Convert to fraction form
    1,278,828.97/1,764,784.13 = 705,869.30/x
  3. Step 3: Cross multiply
    1,278,828.97x = 1,764,784.13 × 705,869.30
  4. Step 4: Simplify right side
    1,278,828.97x = 1,245,706,938,494.21
  5. Step 5: Solve for x
    x = 1,245,706,938,494.21/1,278,828.97
  6. Step 6: Final answer
    x = 974,099.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.