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Finding the Fourth Proportional to 3,655.22, 5,489.01 and 2,390.87

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Solution

The fourth proportional to 3,655.22, 5,489.01 and 2,390.87 is: 3,590.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,655.22 : 5,489.01 = 2,390.87 : x
  2. Step 2: Convert to fraction form
    3,655.22/5,489.01 = 2,390.87/x
  3. Step 3: Cross multiply
    3,655.22x = 5,489.01 × 2,390.87
  4. Step 4: Simplify right side
    3,655.22x = 13,123,509.34
  5. Step 5: Solve for x
    x = 13,123,509.34/3,655.22
  6. Step 6: Final answer
    x = 3,590.35

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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.