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Finding the Fourth Proportional to 1,327.40, 1,831.51 and 803.42

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Solution

The fourth proportional to 1,327.40, 1,831.51 and 803.42 is: 1,108.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.40 : 1,831.51 = 803.42 : x
  2. Step 2: Convert to fraction form
    1,327.40/1,831.51 = 803.42/x
  3. Step 3: Cross multiply
    1,327.40x = 1,831.51 × 803.42
  4. Step 4: Simplify right side
    1,327.40x = 1,471,471.76
  5. Step 5: Solve for x
    x = 1,471,471.76/1,327.40
  6. Step 6: Final answer
    x = 1,108.54

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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.