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Finding the Fourth Proportional to 1,326.92, 1,831.64 and 928.60

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Solution

The fourth proportional to 1,326.92, 1,831.64 and 928.60 is: 1,281.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.92 : 1,831.64 = 928.60 : x
  2. Step 2: Convert to fraction form
    1,326.92/1,831.64 = 928.60/x
  3. Step 3: Cross multiply
    1,326.92x = 1,831.64 × 928.60
  4. Step 4: Simplify right side
    1,326.92x = 1,700,851.68
  5. Step 5: Solve for x
    x = 1,700,851.68/1,326.92
  6. Step 6: Final answer
    x = 1,281.81

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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.