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Finding the Fourth Proportional to 1,352.60, 1,866.75 and 763.15

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Solution

The fourth proportional to 1,352.60, 1,866.75 and 763.15 is: 1,053.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.60 : 1,866.75 = 763.15 : x
  2. Step 2: Convert to fraction form
    1,352.60/1,866.75 = 763.15/x
  3. Step 3: Cross multiply
    1,352.60x = 1,866.75 × 763.15
  4. Step 4: Simplify right side
    1,352.60x = 1,424,610.26
  5. Step 5: Solve for x
    x = 1,424,610.26/1,352.60
  6. Step 6: Final answer
    x = 1,053.24

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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.