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Finding the Fourth Proportional to 2,289.84, 3,160 and 1,295.12

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Solution

The fourth proportional to 2,289.84, 3,160 and 1,295.12 is: 1,787.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.84 : 3,160 = 1,295.12 : x
  2. Step 2: Convert to fraction form
    2,289.84/3,160 = 1,295.12/x
  3. Step 3: Cross multiply
    2,289.84x = 3,160 × 1,295.12
  4. Step 4: Simplify right side
    2,289.84x = 4,092,579.20
  5. Step 5: Solve for x
    x = 4,092,579.20/2,289.84
  6. Step 6: Final answer
    x = 1,787.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.