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Finding the Fourth Proportional to 3,480, 4,802.40 and 2,238.72

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Solution

The fourth proportional to 3,480, 4,802.40 and 2,238.72 is: 3,089.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480 : 4,802.40 = 2,238.72 : x
  2. Step 2: Convert to fraction form
    3,480/4,802.40 = 2,238.72/x
  3. Step 3: Cross multiply
    3,480x = 4,802.40 × 2,238.72
  4. Step 4: Simplify right side
    3,480x = 10,751,228.93
  5. Step 5: Solve for x
    x = 10,751,228.93/3,480
  6. Step 6: Final answer
    x = 3,089.43

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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.