Home / 716,121.11-988,227.40-393,831.20

Finding the Fourth Proportional to 716,121.11, 988,227.40 and 393,831.20

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Solution

The fourth proportional to 716,121.11, 988,227.40 and 393,831.20 is: 543,476.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,121.11 : 988,227.40 = 393,831.20 : x
  2. Step 2: Convert to fraction form
    716,121.11/988,227.40 = 393,831.20/x
  3. Step 3: Cross multiply
    716,121.11x = 988,227.40 × 393,831.20
  4. Step 4: Simplify right side
    716,121.11x = 389,194,780,845.72
  5. Step 5: Solve for x
    x = 389,194,780,845.72/716,121.11
  6. Step 6: Final answer
    x = 543,476.20

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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.