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Finding the Fourth Proportional to 3,438.84, 5,158.37 and 841.78

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Solution

The fourth proportional to 3,438.84, 5,158.37 and 841.78 is: 1,262.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.84 : 5,158.37 = 841.78 : x
  2. Step 2: Convert to fraction form
    3,438.84/5,158.37 = 841.78/x
  3. Step 3: Cross multiply
    3,438.84x = 5,158.37 × 841.78
  4. Step 4: Simplify right side
    3,438.84x = 4,342,216.52
  5. Step 5: Solve for x
    x = 4,342,216.52/3,438.84
  6. Step 6: Final answer
    x = 1,262.70

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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.