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Finding the Fourth Proportional to 2,448.70, 3,670 and 987.05

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Solution

The fourth proportional to 2,448.70, 3,670 and 987.05 is: 1,479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,448.70 : 3,670 = 987.05 : x
  2. Step 2: Convert to fraction form
    2,448.70/3,670 = 987.05/x
  3. Step 3: Cross multiply
    2,448.70x = 3,670 × 987.05
  4. Step 4: Simplify right side
    2,448.70x = 3,622,473.50
  5. Step 5: Solve for x
    x = 3,622,473.50/2,448.70
  6. Step 6: Final answer
    x = 1,479.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.