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Finding the Fourth Proportional to 2,603.72, 3,905.57 and 655.92

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Solution

The fourth proportional to 2,603.72, 3,905.57 and 655.92 is: 983.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,603.72 : 3,905.57 = 655.92 : x
  2. Step 2: Convert to fraction form
    2,603.72/3,905.57 = 655.92/x
  3. Step 3: Cross multiply
    2,603.72x = 3,905.57 × 655.92
  4. Step 4: Simplify right side
    2,603.72x = 2,561,743.11
  5. Step 5: Solve for x
    x = 2,561,743.11/2,603.72
  6. Step 6: Final answer
    x = 983.88

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1.5x scale

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.