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Finding the Fourth Proportional to 954.20, 1,315.78 and 754.69

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Solution

The fourth proportional to 954.20, 1,315.78 and 754.69 is: 1,040.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.20 : 1,315.78 = 754.69 : x
  2. Step 2: Convert to fraction form
    954.20/1,315.78 = 754.69/x
  3. Step 3: Cross multiply
    954.20x = 1,315.78 × 754.69
  4. Step 4: Simplify right side
    954.20x = 993,006.01
  5. Step 5: Solve for x
    x = 993,006.01/954.20
  6. Step 6: Final answer
    x = 1,040.67

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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.