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Finding the Fourth Proportional to 831.91, 1,147.80 and 537.35

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Solution

The fourth proportional to 831.91, 1,147.80 and 537.35 is: 741.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.91 : 1,147.80 = 537.35 : x
  2. Step 2: Convert to fraction form
    831.91/1,147.80 = 537.35/x
  3. Step 3: Cross multiply
    831.91x = 1,147.80 × 537.35
  4. Step 4: Simplify right side
    831.91x = 616,770.33
  5. Step 5: Solve for x
    x = 616,770.33/831.91
  6. Step 6: Final answer
    x = 741.39

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Double scale
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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.