Home / 312,640.35-431,444.07-169,400.36

Finding the Fourth Proportional to 312,640.35, 431,444.07 and 169,400.36

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Solution

The fourth proportional to 312,640.35, 431,444.07 and 169,400.36 is: 233,772.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,640.35 : 431,444.07 = 169,400.36 : x
  2. Step 2: Convert to fraction form
    312,640.35/431,444.07 = 169,400.36/x
  3. Step 3: Cross multiply
    312,640.35x = 431,444.07 × 169,400.36
  4. Step 4: Simplify right side
    312,640.35x = 73,086,778,620.64
  5. Step 5: Solve for x
    x = 73,086,778,620.64/312,640.35
  6. Step 6: Final answer
    x = 233,772.70

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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.