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Finding the Fourth Proportional to 5,246.40, 7,868.70 and 1,957.80

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Solution

The fourth proportional to 5,246.40, 7,868.70 and 1,957.80 is: 2,936.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,246.40 : 7,868.70 = 1,957.80 : x
  2. Step 2: Convert to fraction form
    5,246.40/7,868.70 = 1,957.80/x
  3. Step 3: Cross multiply
    5,246.40x = 7,868.70 × 1,957.80
  4. Step 4: Simplify right side
    5,246.40x = 15,405,340.86
  5. Step 5: Solve for x
    x = 15,405,340.86/5,246.40
  6. Step 6: Final answer
    x = 2,936.36

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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.