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Finding the Fourth Proportional to 1,358.84, 2,038.40 and 743.44

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Solution

The fourth proportional to 1,358.84, 2,038.40 and 743.44 is: 1,115.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.84 : 2,038.40 = 743.44 : x
  2. Step 2: Convert to fraction form
    1,358.84/2,038.40 = 743.44/x
  3. Step 3: Cross multiply
    1,358.84x = 2,038.40 × 743.44
  4. Step 4: Simplify right side
    1,358.84x = 1,515,428.10
  5. Step 5: Solve for x
    x = 1,515,428.10/1,358.84
  6. Step 6: Final answer
    x = 1,115.24

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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.