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Finding the Fourth Proportional to 1,686.26, 2,526.96 and 711.02

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Solution

The fourth proportional to 1,686.26, 2,526.96 and 711.02 is: 1,065.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.26 : 2,526.96 = 711.02 : x
  2. Step 2: Convert to fraction form
    1,686.26/2,526.96 = 711.02/x
  3. Step 3: Cross multiply
    1,686.26x = 2,526.96 × 711.02
  4. Step 4: Simplify right side
    1,686.26x = 1,796,719.10
  5. Step 5: Solve for x
    x = 1,796,719.10/1,686.26
  6. Step 6: Final answer
    x = 1,065.51

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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.