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Finding the Fourth Proportional to 315,805.28, 435,806.06 and 172,562.27

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Solution

The fourth proportional to 315,805.28, 435,806.06 and 172,562.27 is: 238,133.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,805.28 : 435,806.06 = 172,562.27 : x
  2. Step 2: Convert to fraction form
    315,805.28/435,806.06 = 172,562.27/x
  3. Step 3: Cross multiply
    315,805.28x = 435,806.06 × 172,562.27
  4. Step 4: Simplify right side
    315,805.28x = 75,203,679,951.51
  5. Step 5: Solve for x
    x = 75,203,679,951.51/315,805.28
  6. Step 6: Final answer
    x = 238,133.07

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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.