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Finding the Fourth Proportional to 312,057.80, 468,086.70 and 259,569.80

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Solution

The fourth proportional to 312,057.80, 468,086.70 and 259,569.80 is: 389,354.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,057.80 : 468,086.70 = 259,569.80 : x
  2. Step 2: Convert to fraction form
    312,057.80/468,086.70 = 259,569.80/x
  3. Step 3: Cross multiply
    312,057.80x = 468,086.70 × 259,569.80
  4. Step 4: Simplify right side
    312,057.80x = 121,501,171,101.66
  5. Step 5: Solve for x
    x = 121,501,171,101.66/312,057.80
  6. Step 6: Final answer
    x = 389,354.70

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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.