Home / 2,987.42-4,123.13-1,728.26

Finding the Fourth Proportional to 2,987.42, 4,123.13 and 1,728.26

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Solution

The fourth proportional to 2,987.42, 4,123.13 and 1,728.26 is: 2,385.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.42 : 4,123.13 = 1,728.26 : x
  2. Step 2: Convert to fraction form
    2,987.42/4,123.13 = 1,728.26/x
  3. Step 3: Cross multiply
    2,987.42x = 4,123.13 × 1,728.26
  4. Step 4: Simplify right side
    2,987.42x = 7,125,811.40
  5. Step 5: Solve for x
    x = 7,125,811.40/2,987.42
  6. Step 6: Final answer
    x = 2,385.28

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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.