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Finding the Fourth Proportional to 315,806.28, 435,807.43 and 172,563.27

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Solution

The fourth proportional to 315,806.28, 435,807.43 and 172,563.27 is: 238,134.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,806.28 : 435,807.43 = 172,563.27 : x
  2. Step 2: Convert to fraction form
    315,806.28/435,807.43 = 172,563.27/x
  3. Step 3: Cross multiply
    315,806.28x = 435,807.43 × 172,563.27
  4. Step 4: Simplify right side
    315,806.28x = 75,204,355,211.10
  5. Step 5: Solve for x
    x = 75,204,355,211.10/315,806.28
  6. Step 6: Final answer
    x = 238,134.45

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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.