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Finding the Fourth Proportional to 1,265,694.88, 1,899,854.57 and 847,890.40

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Solution

The fourth proportional to 1,265,694.88, 1,899,854.57 and 847,890.40 is: 1,272,714.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265,694.88 : 1,899,854.57 = 847,890.40 : x
  2. Step 2: Convert to fraction form
    1,265,694.88/1,899,854.57 = 847,890.40/x
  3. Step 3: Cross multiply
    1,265,694.88x = 1,899,854.57 × 847,890.40
  4. Step 4: Simplify right side
    1,265,694.88x = 1,610,868,451,299.13
  5. Step 5: Solve for x
    x = 1,610,868,451,299.13/1,265,694.88
  6. Step 6: Final answer
    x = 1,272,714.68

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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.