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Finding the Fourth Proportional to 2,665.40, 3,678.04 and 1,486.40

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Solution

The fourth proportional to 2,665.40, 3,678.04 and 1,486.40 is: 2,051.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,665.40 : 3,678.04 = 1,486.40 : x
  2. Step 2: Convert to fraction form
    2,665.40/3,678.04 = 1,486.40/x
  3. Step 3: Cross multiply
    2,665.40x = 3,678.04 × 1,486.40
  4. Step 4: Simplify right side
    2,665.40x = 5,467,038.66
  5. Step 5: Solve for x
    x = 5,467,038.66/2,665.40
  6. Step 6: Final answer
    x = 2,051.11

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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.