Home / 2,148.90-2,965.28-1,217.40

Finding the Fourth Proportional to 2,148.90, 2,965.28 and 1,217.40

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Solution

The fourth proportional to 2,148.90, 2,965.28 and 1,217.40 is: 1,679.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.90 : 2,965.28 = 1,217.40 : x
  2. Step 2: Convert to fraction form
    2,148.90/2,965.28 = 1,217.40/x
  3. Step 3: Cross multiply
    2,148.90x = 2,965.28 × 1,217.40
  4. Step 4: Simplify right side
    2,148.90x = 3,609,931.87
  5. Step 5: Solve for x
    x = 3,609,931.87/2,148.90
  6. Step 6: Final answer
    x = 1,679.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.