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Finding the Fourth Proportional to 808.56, 1,113.36 and 677.34

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Solution

The fourth proportional to 808.56, 1,113.36 and 677.34 is: 932.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.56 : 1,113.36 = 677.34 : x
  2. Step 2: Convert to fraction form
    808.56/1,113.36 = 677.34/x
  3. Step 3: Cross multiply
    808.56x = 1,113.36 × 677.34
  4. Step 4: Simplify right side
    808.56x = 754,123.26
  5. Step 5: Solve for x
    x = 754,123.26/808.56
  6. Step 6: Final answer
    x = 932.67

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1.5x scale

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.