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Finding the Fourth Proportional to 631.11, 871.77 and 526.56

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Solution

The fourth proportional to 631.11, 871.77 and 526.56 is: 727.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.11 : 871.77 = 526.56 : x
  2. Step 2: Convert to fraction form
    631.11/871.77 = 526.56/x
  3. Step 3: Cross multiply
    631.11x = 871.77 × 526.56
  4. Step 4: Simplify right side
    631.11x = 459,039.21
  5. Step 5: Solve for x
    x = 459,039.21/631.11
  6. Step 6: Final answer
    x = 727.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.