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Finding the Fourth Proportional to 2,666.90, 3,680.16 and 1,487.95

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Solution

The fourth proportional to 2,666.90, 3,680.16 and 1,487.95 is: 2,053.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.90 : 3,680.16 = 1,487.95 : x
  2. Step 2: Convert to fraction form
    2,666.90/3,680.16 = 1,487.95/x
  3. Step 3: Cross multiply
    2,666.90x = 3,680.16 × 1,487.95
  4. Step 4: Simplify right side
    2,666.90x = 5,475,894.07
  5. Step 5: Solve for x
    x = 5,475,894.07/2,666.90
  6. Step 6: Final answer
    x = 2,053.28

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.