Home / 2,989.40-4,484.12-1,256.80

Finding the Fourth Proportional to 2,989.40, 4,484.12 and 1,256.80

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Solution

The fourth proportional to 2,989.40, 4,484.12 and 1,256.80 is: 1,885.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.40 : 4,484.12 = 1,256.80 : x
  2. Step 2: Convert to fraction form
    2,989.40/4,484.12 = 1,256.80/x
  3. Step 3: Cross multiply
    2,989.40x = 4,484.12 × 1,256.80
  4. Step 4: Simplify right side
    2,989.40x = 5,635,642.02
  5. Step 5: Solve for x
    x = 5,635,642.02/2,989.40
  6. Step 6: Final answer
    x = 1,885.21

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1.5x scale

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.