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Finding the Fourth Proportional to 831.51, 1,147.49 and 458.50

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Solution

The fourth proportional to 831.51, 1,147.49 and 458.50 is: 632.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.51 : 1,147.49 = 458.50 : x
  2. Step 2: Convert to fraction form
    831.51/1,147.49 = 458.50/x
  3. Step 3: Cross multiply
    831.51x = 1,147.49 × 458.50
  4. Step 4: Simplify right side
    831.51x = 526,124.17
  5. Step 5: Solve for x
    x = 526,124.17/831.51
  6. Step 6: Final answer
    x = 632.73

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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.