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Finding the Fourth Proportional to 5,307.87, 7,961.19 and 1,412.58

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Solution

The fourth proportional to 5,307.87, 7,961.19 and 1,412.58 is: 2,118.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,307.87 : 7,961.19 = 1,412.58 : x
  2. Step 2: Convert to fraction form
    5,307.87/7,961.19 = 1,412.58/x
  3. Step 3: Cross multiply
    5,307.87x = 7,961.19 × 1,412.58
  4. Step 4: Simplify right side
    5,307.87x = 11,245,787.92
  5. Step 5: Solve for x
    x = 11,245,787.92/5,307.87
  6. Step 6: Final answer
    x = 2,118.70

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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.