Home / 3,987.02-5,503.34-3,240.41

Finding the Fourth Proportional to 3,987.02, 5,503.34 and 3,240.41

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Solution

The fourth proportional to 3,987.02, 5,503.34 and 3,240.41 is: 4,472.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.02 : 5,503.34 = 3,240.41 : x
  2. Step 2: Convert to fraction form
    3,987.02/5,503.34 = 3,240.41/x
  3. Step 3: Cross multiply
    3,987.02x = 5,503.34 × 3,240.41
  4. Step 4: Simplify right side
    3,987.02x = 17,833,058.55
  5. Step 5: Solve for x
    x = 17,833,058.55/3,987.02
  6. Step 6: Final answer
    x = 4,472.78

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1.5x scale

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.