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Finding the Fourth Proportional to 1,352,556.80, 1,868,472.60 and 1,080,267.20

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Solution

The fourth proportional to 1,352,556.80, 1,868,472.60 and 1,080,267.20 is: 1,492,321.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352,556.80 : 1,868,472.60 = 1,080,267.20 : x
  2. Step 2: Convert to fraction form
    1,352,556.80/1,868,472.60 = 1,080,267.20/x
  3. Step 3: Cross multiply
    1,352,556.80x = 1,868,472.60 × 1,080,267.20
  4. Step 4: Simplify right side
    1,352,556.80x = 2,018,449,663,878.72
  5. Step 5: Solve for x
    x = 2,018,449,663,878.72/1,352,556.80
  6. Step 6: Final answer
    x = 1,492,321.55

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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.