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Finding the Fourth Proportional to 315,216.70, 434,998.43 and 171,976.84

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Solution

The fourth proportional to 315,216.70, 434,998.43 and 171,976.84 is: 237,327.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,216.70 : 434,998.43 = 171,976.84 : x
  2. Step 2: Convert to fraction form
    315,216.70/434,998.43 = 171,976.84/x
  3. Step 3: Cross multiply
    315,216.70x = 434,998.43 × 171,976.84
  4. Step 4: Simplify right side
    315,216.70x = 74,809,655,396.36
  5. Step 5: Solve for x
    x = 74,809,655,396.36/315,216.70
  6. Step 6: Final answer
    x = 237,327.70

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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.