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Finding the Fourth Proportional to 2,639.40, 3,642.03 and 1,460.40

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Solution

The fourth proportional to 2,639.40, 3,642.03 and 1,460.40 is: 2,015.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.40 : 3,642.03 = 1,460.40 : x
  2. Step 2: Convert to fraction form
    2,639.40/3,642.03 = 1,460.40/x
  3. Step 3: Cross multiply
    2,639.40x = 3,642.03 × 1,460.40
  4. Step 4: Simplify right side
    2,639.40x = 5,318,820.61
  5. Step 5: Solve for x
    x = 5,318,820.61/2,639.40
  6. Step 6: Final answer
    x = 2,015.16

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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.