Home / 3,920.01-5,878.40-1,321.53

Finding the Fourth Proportional to 3,920.01, 5,878.40 and 1,321.53

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Solution

The fourth proportional to 3,920.01, 5,878.40 and 1,321.53 is: 1,981.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.01 : 5,878.40 = 1,321.53 : x
  2. Step 2: Convert to fraction form
    3,920.01/5,878.40 = 1,321.53/x
  3. Step 3: Cross multiply
    3,920.01x = 5,878.40 × 1,321.53
  4. Step 4: Simplify right side
    3,920.01x = 7,768,475.34
  5. Step 5: Solve for x
    x = 7,768,475.34/3,920.01
  6. Step 6: Final answer
    x = 1,981.75

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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.