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Finding the Fourth Proportional to 900.23, 1,351.46 and 858.67

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Solution

The fourth proportional to 900.23, 1,351.46 and 858.67 is: 1,289.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.23 : 1,351.46 = 858.67 : x
  2. Step 2: Convert to fraction form
    900.23/1,351.46 = 858.67/x
  3. Step 3: Cross multiply
    900.23x = 1,351.46 × 858.67
  4. Step 4: Simplify right side
    900.23x = 1,160,447.11
  5. Step 5: Solve for x
    x = 1,160,447.11/900.23
  6. Step 6: Final answer
    x = 1,289.06

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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.