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Finding the Fourth Proportional to 831.03, 1,146.66 and 499.33

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Solution

The fourth proportional to 831.03, 1,146.66 and 499.33 is: 688.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.03 : 1,146.66 = 499.33 : x
  2. Step 2: Convert to fraction form
    831.03/1,146.66 = 499.33/x
  3. Step 3: Cross multiply
    831.03x = 1,146.66 × 499.33
  4. Step 4: Simplify right side
    831.03x = 572,564.60
  5. Step 5: Solve for x
    x = 572,564.60/831.03
  6. Step 6: Final answer
    x = 688.98

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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.