Home / 1,686.51-2,530.27-865.36

Finding the Fourth Proportional to 1,686.51, 2,530.27 and 865.36

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Solution

The fourth proportional to 1,686.51, 2,530.27 and 865.36 is: 1,298.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.51 : 2,530.27 = 865.36 : x
  2. Step 2: Convert to fraction form
    1,686.51/2,530.27 = 865.36/x
  3. Step 3: Cross multiply
    1,686.51x = 2,530.27 × 865.36
  4. Step 4: Simplify right side
    1,686.51x = 2,189,598.69
  5. Step 5: Solve for x
    x = 2,189,598.69/1,686.51
  6. Step 6: Final answer
    x = 1,298.30

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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.