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Finding the Fourth Proportional to 831.95, 1,148.07 and 458.92

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Solution

The fourth proportional to 831.95, 1,148.07 and 458.92 is: 633.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.95 : 1,148.07 = 458.92 : x
  2. Step 2: Convert to fraction form
    831.95/1,148.07 = 458.92/x
  3. Step 3: Cross multiply
    831.95x = 1,148.07 × 458.92
  4. Step 4: Simplify right side
    831.95x = 526,872.28
  5. Step 5: Solve for x
    x = 526,872.28/831.95
  6. Step 6: Final answer
    x = 633.30

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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.