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Finding the Fourth Proportional to 2,428.66, 3,642.99 and 697.28

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Solution

The fourth proportional to 2,428.66, 3,642.99 and 697.28 is: 1,045.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.66 : 3,642.99 = 697.28 : x
  2. Step 2: Convert to fraction form
    2,428.66/3,642.99 = 697.28/x
  3. Step 3: Cross multiply
    2,428.66x = 3,642.99 × 697.28
  4. Step 4: Simplify right side
    2,428.66x = 2,540,180.58
  5. Step 5: Solve for x
    x = 2,540,180.58/2,428.66
  6. Step 6: Final answer
    x = 1,045.92

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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.