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Finding the Fourth Proportional to 312,791.70, 469,533.15 and 172,823.70

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Solution

The fourth proportional to 312,791.70, 469,533.15 and 172,823.70 is: 259,426.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,791.70 : 469,533.15 = 172,823.70 : x
  2. Step 2: Convert to fraction form
    312,791.70/469,533.15 = 172,823.70/x
  3. Step 3: Cross multiply
    312,791.70x = 469,533.15 × 172,823.70
  4. Step 4: Simplify right side
    312,791.70x = 81,146,456,255.66
  5. Step 5: Solve for x
    x = 81,146,456,255.66/312,791.70
  6. Step 6: Final answer
    x = 259,426.50

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1.5x scale

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.