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Finding the Fourth Proportional to 2,351, 3,242.88 and 1,511.40

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Solution

The fourth proportional to 2,351, 3,242.88 and 1,511.40 is: 2,084.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,351 : 3,242.88 = 1,511.40 : x
  2. Step 2: Convert to fraction form
    2,351/3,242.88 = 1,511.40/x
  3. Step 3: Cross multiply
    2,351x = 3,242.88 × 1,511.40
  4. Step 4: Simplify right side
    2,351x = 4,901,288.83
  5. Step 5: Solve for x
    x = 4,901,288.83/2,351
  6. Step 6: Final answer
    x = 2,084.77

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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.