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Finding the Fourth Proportional to 831.76, 1,146.57 and 684.14

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Solution

The fourth proportional to 831.76, 1,146.57 and 684.14 is: 943.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.76 : 1,146.57 = 684.14 : x
  2. Step 2: Convert to fraction form
    831.76/1,146.57 = 684.14/x
  3. Step 3: Cross multiply
    831.76x = 1,146.57 × 684.14
  4. Step 4: Simplify right side
    831.76x = 784,408.67
  5. Step 5: Solve for x
    x = 784,408.67/831.76
  6. Step 6: Final answer
    x = 943.07

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Half scale
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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.