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Finding the Fourth Proportional to 2,429.70, 3,647.28 and 969.88

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Solution

The fourth proportional to 2,429.70, 3,647.28 and 969.88 is: 1,455.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,429.70 : 3,647.28 = 969.88 : x
  2. Step 2: Convert to fraction form
    2,429.70/3,647.28 = 969.88/x
  3. Step 3: Cross multiply
    2,429.70x = 3,647.28 × 969.88
  4. Step 4: Simplify right side
    2,429.70x = 3,537,423.93
  5. Step 5: Solve for x
    x = 3,537,423.93/2,429.70
  6. Step 6: Final answer
    x = 1,455.91

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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.