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Finding the Fourth Proportional to 315,212.92, 434,995.31 and 171,976.16

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Solution

The fourth proportional to 315,212.92, 434,995.31 and 171,976.16 is: 237,327.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,212.92 : 434,995.31 = 171,976.16 : x
  2. Step 2: Convert to fraction form
    315,212.92/434,995.31 = 171,976.16/x
  3. Step 3: Cross multiply
    315,212.92x = 434,995.31 × 171,976.16
  4. Step 4: Simplify right side
    315,212.92x = 74,808,824,549.24
  5. Step 5: Solve for x
    x = 74,808,824,549.24/315,212.92
  6. Step 6: Final answer
    x = 237,327.92

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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.