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Finding the Fourth Proportional to 851.23, 1,174.40 and 556.67

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Solution

The fourth proportional to 851.23, 1,174.40 and 556.67 is: 768.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.23 : 1,174.40 = 556.67 : x
  2. Step 2: Convert to fraction form
    851.23/1,174.40 = 556.67/x
  3. Step 3: Cross multiply
    851.23x = 1,174.40 × 556.67
  4. Step 4: Simplify right side
    851.23x = 653,750.46
  5. Step 5: Solve for x
    x = 653,750.46/851.23
  6. Step 6: Final answer
    x = 768.01

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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.