Home / 1,686.18-2,527.20-1,378.65

Finding the Fourth Proportional to 1,686.18, 2,527.20 and 1,378.65

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Solution

The fourth proportional to 1,686.18, 2,527.20 and 1,378.65 is: 2,066.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686.18 : 2,527.20 = 1,378.65 : x
  2. Step 2: Convert to fraction form
    1,686.18/2,527.20 = 1,378.65/x
  3. Step 3: Cross multiply
    1,686.18x = 2,527.20 × 1,378.65
  4. Step 4: Simplify right side
    1,686.18x = 3,484,124.28
  5. Step 5: Solve for x
    x = 3,484,124.28/1,686.18
  6. Step 6: Final answer
    x = 2,066.28

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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.