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Finding the Fourth Proportional to 312,553.45, 431,325.08 and 169,313.50

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Solution

The fourth proportional to 312,553.45, 431,325.08 and 169,313.50 is: 233,653.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,553.45 : 431,325.08 = 169,313.50 : x
  2. Step 2: Convert to fraction form
    312,553.45/431,325.08 = 169,313.50/x
  3. Step 3: Cross multiply
    312,553.45x = 431,325.08 × 169,313.50
  4. Step 4: Simplify right side
    312,553.45x = 73,029,157,786.28
  5. Step 5: Solve for x
    x = 73,029,157,786.28/312,553.45
  6. Step 6: Final answer
    x = 233,653.34

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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.