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Finding the Fourth Proportional to 1,686.22, 2,530.13 and 762.06

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Solution

The fourth proportional to 1,686.22, 2,530.13 and 762.06 is: 1,143.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.22 : 2,530.13 = 762.06 : x
  2. Step 2: Convert to fraction form
    1,686.22/2,530.13 = 762.06/x
  3. Step 3: Cross multiply
    1,686.22x = 2,530.13 × 762.06
  4. Step 4: Simplify right side
    1,686.22x = 1,928,110.87
  5. Step 5: Solve for x
    x = 1,928,110.87/1,686.22
  6. Step 6: Final answer
    x = 1,143.45

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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.