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Finding the Fourth Proportional to 3,851.79, 5,777.70 and 930.09

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Solution

The fourth proportional to 3,851.79, 5,777.70 and 930.09 is: 1,395.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.79 : 5,777.70 = 930.09 : x
  2. Step 2: Convert to fraction form
    3,851.79/5,777.70 = 930.09/x
  3. Step 3: Cross multiply
    3,851.79x = 5,777.70 × 930.09
  4. Step 4: Simplify right side
    3,851.79x = 5,373,799.17
  5. Step 5: Solve for x
    x = 5,373,799.17/3,851.79
  6. Step 6: Final answer
    x = 1,395.14

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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.