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Finding the Fourth Proportional to 393,040.16, 589,557.72 and 112,558.40

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Solution

The fourth proportional to 393,040.16, 589,557.72 and 112,558.40 is: 168,836.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,040.16 : 589,557.72 = 112,558.40 : x
  2. Step 2: Convert to fraction form
    393,040.16/589,557.72 = 112,558.40/x
  3. Step 3: Cross multiply
    393,040.16x = 589,557.72 × 112,558.40
  4. Step 4: Simplify right side
    393,040.16x = 66,359,673,670.85
  5. Step 5: Solve for x
    x = 66,359,673,670.85/393,040.16
  6. Step 6: Final answer
    x = 168,836.88

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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.