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Finding the Fourth Proportional to 2,389, 3,298.80 and 1,894.18

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Solution

The fourth proportional to 2,389, 3,298.80 and 1,894.18 is: 2,615.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389 : 3,298.80 = 1,894.18 : x
  2. Step 2: Convert to fraction form
    2,389/3,298.80 = 1,894.18/x
  3. Step 3: Cross multiply
    2,389x = 3,298.80 × 1,894.18
  4. Step 4: Simplify right side
    2,389x = 6,248,520.98
  5. Step 5: Solve for x
    x = 6,248,520.98/2,389
  6. Step 6: Final answer
    x = 2,615.54

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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.