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Finding the Fourth Proportional to 2,688.66, 4,032.99 and 740.87

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Solution

The fourth proportional to 2,688.66, 4,032.99 and 740.87 is: 1,111.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.66 : 4,032.99 = 740.87 : x
  2. Step 2: Convert to fraction form
    2,688.66/4,032.99 = 740.87/x
  3. Step 3: Cross multiply
    2,688.66x = 4,032.99 × 740.87
  4. Step 4: Simplify right side
    2,688.66x = 2,987,901.14
  5. Step 5: Solve for x
    x = 2,987,901.14/2,688.66
  6. Step 6: Final answer
    x = 1,111.30

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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.