Home / 1,556.91-2,149.02-1,242.72

Finding the Fourth Proportional to 1,556.91, 2,149.02 and 1,242.72

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Solution

The fourth proportional to 1,556.91, 2,149.02 and 1,242.72 is: 1,715.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.91 : 2,149.02 = 1,242.72 : x
  2. Step 2: Convert to fraction form
    1,556.91/2,149.02 = 1,242.72/x
  3. Step 3: Cross multiply
    1,556.91x = 2,149.02 × 1,242.72
  4. Step 4: Simplify right side
    1,556.91x = 2,670,630.13
  5. Step 5: Solve for x
    x = 2,670,630.13/1,556.91
  6. Step 6: Final answer
    x = 1,715.34

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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.