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Finding the Fourth Proportional to 771.08, 1,155.81 and 527.54

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Solution

The fourth proportional to 771.08, 1,155.81 and 527.54 is: 790.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.08 : 1,155.81 = 527.54 : x
  2. Step 2: Convert to fraction form
    771.08/1,155.81 = 527.54/x
  3. Step 3: Cross multiply
    771.08x = 1,155.81 × 527.54
  4. Step 4: Simplify right side
    771.08x = 609,736.01
  5. Step 5: Solve for x
    x = 609,736.01/771.08
  6. Step 6: Final answer
    x = 790.76

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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.