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Finding the Fourth Proportional to 2,428.42, 3,642.77 and 697

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Solution

The fourth proportional to 2,428.42, 3,642.77 and 697 is: 1,045.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.42 : 3,642.77 = 697 : x
  2. Step 2: Convert to fraction form
    2,428.42/3,642.77 = 697/x
  3. Step 3: Cross multiply
    2,428.42x = 3,642.77 × 697
  4. Step 4: Simplify right side
    2,428.42x = 2,539,010.69
  5. Step 5: Solve for x
    x = 2,539,010.69/2,428.42
  6. Step 6: Final answer
    x = 1,045.54

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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.