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Finding the Fourth Proportional to 312,805.20, 431,673.39 and 169,567.50

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Solution

The fourth proportional to 312,805.20, 431,673.39 and 169,567.50 is: 234,004.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,805.20 : 431,673.39 = 169,567.50 : x
  2. Step 2: Convert to fraction form
    312,805.20/431,673.39 = 169,567.50/x
  3. Step 3: Cross multiply
    312,805.20x = 431,673.39 × 169,567.50
  4. Step 4: Simplify right side
    312,805.20x = 73,197,777,558.83
  5. Step 5: Solve for x
    x = 73,197,777,558.83/312,805.20
  6. Step 6: Final answer
    x = 234,004.35

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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.