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Finding the Fourth Proportional to 831.48, 1,244.99 and 676.77

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Solution

The fourth proportional to 831.48, 1,244.99 and 676.77 is: 1,013.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.48 : 1,244.99 = 676.77 : x
  2. Step 2: Convert to fraction form
    831.48/1,244.99 = 676.77/x
  3. Step 3: Cross multiply
    831.48x = 1,244.99 × 676.77
  4. Step 4: Simplify right side
    831.48x = 842,568.50
  5. Step 5: Solve for x
    x = 842,568.50/831.48
  6. Step 6: Final answer
    x = 1,013.34

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1.5x scale

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.