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Finding the Fourth Proportional to 1,352.80, 1,866.84 and 763.36

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Solution

The fourth proportional to 1,352.80, 1,866.84 and 763.36 is: 1,053.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.80 : 1,866.84 = 763.36 : x
  2. Step 2: Convert to fraction form
    1,352.80/1,866.84 = 763.36/x
  3. Step 3: Cross multiply
    1,352.80x = 1,866.84 × 763.36
  4. Step 4: Simplify right side
    1,352.80x = 1,425,070.98
  5. Step 5: Solve for x
    x = 1,425,070.98/1,352.80
  6. Step 6: Final answer
    x = 1,053.42

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1.5x scale

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.