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Finding the Fourth Proportional to 2,518.79, 3,475.80 and 1,399.79

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Solution

The fourth proportional to 2,518.79, 3,475.80 and 1,399.79 is: 1,931.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,518.79 : 3,475.80 = 1,399.79 : x
  2. Step 2: Convert to fraction form
    2,518.79/3,475.80 = 1,399.79/x
  3. Step 3: Cross multiply
    2,518.79x = 3,475.80 × 1,399.79
  4. Step 4: Simplify right side
    2,518.79x = 4,865,398.77
  5. Step 5: Solve for x
    x = 4,865,398.77/2,518.79
  6. Step 6: Final answer
    x = 1,931.65

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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.