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Finding the Fourth Proportional to 1,777.45, 2,452.91 and 980.81

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Solution

The fourth proportional to 1,777.45, 2,452.91 and 980.81 is: 1,353.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.45 : 2,452.91 = 980.81 : x
  2. Step 2: Convert to fraction form
    1,777.45/2,452.91 = 980.81/x
  3. Step 3: Cross multiply
    1,777.45x = 2,452.91 × 980.81
  4. Step 4: Simplify right side
    1,777.45x = 2,405,838.49
  5. Step 5: Solve for x
    x = 2,405,838.49/1,777.45
  6. Step 6: Final answer
    x = 1,353.53

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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.