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Finding the Fourth Proportional to 831.03, 1,146.89 and 458.09

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Solution

The fourth proportional to 831.03, 1,146.89 and 458.09 is: 632.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.03 : 1,146.89 = 458.09 : x
  2. Step 2: Convert to fraction form
    831.03/1,146.89 = 458.09/x
  3. Step 3: Cross multiply
    831.03x = 1,146.89 × 458.09
  4. Step 4: Simplify right side
    831.03x = 525,378.43
  5. Step 5: Solve for x
    x = 525,378.43/831.03
  6. Step 6: Final answer
    x = 632.20

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1.5x scale

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.