Home / 2,918.60-4,378.72-1,686.88

Finding the Fourth Proportional to 2,918.60, 4,378.72 and 1,686.88

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Solution

The fourth proportional to 2,918.60, 4,378.72 and 1,686.88 is: 2,530.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.60 : 4,378.72 = 1,686.88 : x
  2. Step 2: Convert to fraction form
    2,918.60/4,378.72 = 1,686.88/x
  3. Step 3: Cross multiply
    2,918.60x = 4,378.72 × 1,686.88
  4. Step 4: Simplify right side
    2,918.60x = 7,386,375.19
  5. Step 5: Solve for x
    x = 7,386,375.19/2,918.60
  6. Step 6: Final answer
    x = 2,530.79

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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.