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Finding the Fourth Proportional to 312,373.54, 431,073.66 and 169,130.62

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Solution

The fourth proportional to 312,373.54, 431,073.66 and 169,130.62 is: 233,399.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,373.54 : 431,073.66 = 169,130.62 : x
  2. Step 2: Convert to fraction form
    312,373.54/431,073.66 = 169,130.62/x
  3. Step 3: Cross multiply
    312,373.54x = 431,073.66 × 169,130.62
  4. Step 4: Simplify right side
    312,373.54x = 72,907,755,381.47
  5. Step 5: Solve for x
    x = 72,907,755,381.47/312,373.54
  6. Step 6: Final answer
    x = 233,399.27

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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.