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Finding the Fourth Proportional to 831.16, 1,148.07 and 722.62

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Solution

The fourth proportional to 831.16, 1,148.07 and 722.62 is: 998.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.16 : 1,148.07 = 722.62 : x
  2. Step 2: Convert to fraction form
    831.16/1,148.07 = 722.62/x
  3. Step 3: Cross multiply
    831.16x = 1,148.07 × 722.62
  4. Step 4: Simplify right side
    831.16x = 829,618.34
  5. Step 5: Solve for x
    x = 829,618.34/831.16
  6. Step 6: Final answer
    x = 998.15

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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.