Home / 1,686.31-2,529.45-1,397.14

Finding the Fourth Proportional to 1,686.31, 2,529.45 and 1,397.14

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Solution

The fourth proportional to 1,686.31, 2,529.45 and 1,397.14 is: 2,095.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.31 : 2,529.45 = 1,397.14 : x
  2. Step 2: Convert to fraction form
    1,686.31/2,529.45 = 1,397.14/x
  3. Step 3: Cross multiply
    1,686.31x = 2,529.45 × 1,397.14
  4. Step 4: Simplify right side
    1,686.31x = 3,533,989.45
  5. Step 5: Solve for x
    x = 3,533,989.45/1,686.31
  6. Step 6: Final answer
    x = 2,095.70

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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.