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Finding the Fourth Proportional to 2,625.70, 3,935.20 and 1,393.70

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Solution

The fourth proportional to 2,625.70, 3,935.20 and 1,393.70 is: 2,088.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625.70 : 3,935.20 = 1,393.70 : x
  2. Step 2: Convert to fraction form
    2,625.70/3,935.20 = 1,393.70/x
  3. Step 3: Cross multiply
    2,625.70x = 3,935.20 × 1,393.70
  4. Step 4: Simplify right side
    2,625.70x = 5,484,488.24
  5. Step 5: Solve for x
    x = 5,484,488.24/2,625.70
  6. Step 6: Final answer
    x = 2,088.77

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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.