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Finding the Fourth Proportional to 831.01, 1,246.51 and 648.56

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Solution

The fourth proportional to 831.01, 1,246.51 and 648.56 is: 972.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.01 : 1,246.51 = 648.56 : x
  2. Step 2: Convert to fraction form
    831.01/1,246.51 = 648.56/x
  3. Step 3: Cross multiply
    831.01x = 1,246.51 × 648.56
  4. Step 4: Simplify right side
    831.01x = 808,435.27
  5. Step 5: Solve for x
    x = 808,435.27/831.01
  6. Step 6: Final answer
    x = 972.84

Related Problems

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Half scale
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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.