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Finding the Fourth Proportional to 1,771.01, 2,655.32 and 991.55

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Solution

The fourth proportional to 1,771.01, 2,655.32 and 991.55 is: 1,486.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.01 : 2,655.32 = 991.55 : x
  2. Step 2: Convert to fraction form
    1,771.01/2,655.32 = 991.55/x
  3. Step 3: Cross multiply
    1,771.01x = 2,655.32 × 991.55
  4. Step 4: Simplify right side
    1,771.01x = 2,632,889.80
  5. Step 5: Solve for x
    x = 2,632,889.80/1,771.01
  6. Step 6: Final answer
    x = 1,486.66

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1.5x scale

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.