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Finding the Fourth Proportional to 912.99, 1,260.33 and 581.86

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Solution

The fourth proportional to 912.99, 1,260.33 and 581.86 is: 803.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.99 : 1,260.33 = 581.86 : x
  2. Step 2: Convert to fraction form
    912.99/1,260.33 = 581.86/x
  3. Step 3: Cross multiply
    912.99x = 1,260.33 × 581.86
  4. Step 4: Simplify right side
    912.99x = 733,336.37
  5. Step 5: Solve for x
    x = 733,336.37/912.99
  6. Step 6: Final answer
    x = 803.23

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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.