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Finding the Fourth Proportional to 1,771.15, 2,657.10 and 538.69

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Solution

The fourth proportional to 1,771.15, 2,657.10 and 538.69 is: 808.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.15 : 2,657.10 = 538.69 : x
  2. Step 2: Convert to fraction form
    1,771.15/2,657.10 = 538.69/x
  3. Step 3: Cross multiply
    1,771.15x = 2,657.10 × 538.69
  4. Step 4: Simplify right side
    1,771.15x = 1,431,353.20
  5. Step 5: Solve for x
    x = 1,431,353.20/1,771.15
  6. Step 6: Final answer
    x = 808.15

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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.