Home / 1,217.90-1,827.52-1,125.02

Finding the Fourth Proportional to 1,217.90, 1,827.52 and 1,125.02

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Solution

The fourth proportional to 1,217.90, 1,827.52 and 1,125.02 is: 1,688.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.90 : 1,827.52 = 1,125.02 : x
  2. Step 2: Convert to fraction form
    1,217.90/1,827.52 = 1,125.02/x
  3. Step 3: Cross multiply
    1,217.90x = 1,827.52 × 1,125.02
  4. Step 4: Simplify right side
    1,217.90x = 2,055,996.55
  5. Step 5: Solve for x
    x = 2,055,996.55/1,217.90
  6. Step 6: Final answer
    x = 1,688.15

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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.