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Finding the Fourth Proportional to 1,352.36, 1,866.26 and 762.90

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Solution

The fourth proportional to 1,352.36, 1,866.26 and 762.90 is: 1,052.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.36 : 1,866.26 = 762.90 : x
  2. Step 2: Convert to fraction form
    1,352.36/1,866.26 = 762.90/x
  3. Step 3: Cross multiply
    1,352.36x = 1,866.26 × 762.90
  4. Step 4: Simplify right side
    1,352.36x = 1,423,756.61
  5. Step 5: Solve for x
    x = 1,423,756.61/1,352.36
  6. Step 6: Final answer
    x = 1,052.79

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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.