Home / 3,913.02-5,869.53-1,317.78

Finding the Fourth Proportional to 3,913.02, 5,869.53 and 1,317.78

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Solution

The fourth proportional to 3,913.02, 5,869.53 and 1,317.78 is: 1,976.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.02 : 5,869.53 = 1,317.78 : x
  2. Step 2: Convert to fraction form
    3,913.02/5,869.53 = 1,317.78/x
  3. Step 3: Cross multiply
    3,913.02x = 5,869.53 × 1,317.78
  4. Step 4: Simplify right side
    3,913.02x = 7,734,749.24
  5. Step 5: Solve for x
    x = 7,734,749.24/3,913.02
  6. Step 6: Final answer
    x = 1,976.67

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Similar ratio
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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.