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Finding the Fourth Proportional to 3,156, 4,355.64 and 1,758.48

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Solution

The fourth proportional to 3,156, 4,355.64 and 1,758.48 is: 2,426.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156 : 4,355.64 = 1,758.48 : x
  2. Step 2: Convert to fraction form
    3,156/4,355.64 = 1,758.48/x
  3. Step 3: Cross multiply
    3,156x = 4,355.64 × 1,758.48
  4. Step 4: Simplify right side
    3,156x = 7,659,305.83
  5. Step 5: Solve for x
    x = 7,659,305.83/3,156
  6. Step 6: Final answer
    x = 2,426.90

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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.