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Finding the Fourth Proportional to 5,355.61, 7,390.09 and 2,965.40

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Solution

The fourth proportional to 5,355.61, 7,390.09 and 2,965.40 is: 4,091.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,355.61 : 7,390.09 = 2,965.40 : x
  2. Step 2: Convert to fraction form
    5,355.61/7,390.09 = 2,965.40/x
  3. Step 3: Cross multiply
    5,355.61x = 7,390.09 × 2,965.40
  4. Step 4: Simplify right side
    5,355.61x = 21,914,572.89
  5. Step 5: Solve for x
    x = 21,914,572.89/5,355.61
  6. Step 6: Final answer
    x = 4,091.89

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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.