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Finding the Fourth Proportional to 1,757.79, 2,636.04 and 661.86

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Solution

The fourth proportional to 1,757.79, 2,636.04 and 661.86 is: 992.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,757.79 : 2,636.04 = 661.86 : x
  2. Step 2: Convert to fraction form
    1,757.79/2,636.04 = 661.86/x
  3. Step 3: Cross multiply
    1,757.79x = 2,636.04 × 661.86
  4. Step 4: Simplify right side
    1,757.79x = 1,744,689.43
  5. Step 5: Solve for x
    x = 1,744,689.43/1,757.79
  6. Step 6: Final answer
    x = 992.55

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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.