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Finding the Fourth Proportional to 913.57, 1,260.83 and 520.67

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Solution

The fourth proportional to 913.57, 1,260.83 and 520.67 is: 718.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.57 : 1,260.83 = 520.67 : x
  2. Step 2: Convert to fraction form
    913.57/1,260.83 = 520.67/x
  3. Step 3: Cross multiply
    913.57x = 1,260.83 × 520.67
  4. Step 4: Simplify right side
    913.57x = 656,473.72
  5. Step 5: Solve for x
    x = 656,473.72/913.57
  6. Step 6: Final answer
    x = 718.58

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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.