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Finding the Fourth Proportional to 1,184.78, 1,777.53 and 696.80

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Solution

The fourth proportional to 1,184.78, 1,777.53 and 696.80 is: 1,045.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,184.78 : 1,777.53 = 696.80 : x
  2. Step 2: Convert to fraction form
    1,184.78/1,777.53 = 696.80/x
  3. Step 3: Cross multiply
    1,184.78x = 1,777.53 × 696.80
  4. Step 4: Simplify right side
    1,184.78x = 1,238,582.90
  5. Step 5: Solve for x
    x = 1,238,582.90/1,184.78
  6. Step 6: Final answer
    x = 1,045.41

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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.