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Finding the Fourth Proportional to 2,398.95, 3,309.12 and 1,513.17

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Solution

The fourth proportional to 2,398.95, 3,309.12 and 1,513.17 is: 2,087.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,398.95 : 3,309.12 = 1,513.17 : x
  2. Step 2: Convert to fraction form
    2,398.95/3,309.12 = 1,513.17/x
  3. Step 3: Cross multiply
    2,398.95x = 3,309.12 × 1,513.17
  4. Step 4: Simplify right side
    2,398.95x = 5,007,261.11
  5. Step 5: Solve for x
    x = 5,007,261.11/2,398.95
  6. Step 6: Final answer
    x = 2,087.27

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1.5x scale

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.