Home / 312,400.18-431,144.07-225,256.96

Finding the Fourth Proportional to 312,400.18, 431,144.07 and 225,256.96

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Solution

The fourth proportional to 312,400.18, 431,144.07 and 225,256.96 is: 310,877.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,400.18 : 431,144.07 = 225,256.96 : x
  2. Step 2: Convert to fraction form
    312,400.18/431,144.07 = 225,256.96/x
  3. Step 3: Cross multiply
    312,400.18x = 431,144.07 × 225,256.96
  4. Step 4: Simplify right side
    312,400.18x = 97,118,203,884.51
  5. Step 5: Solve for x
    x = 97,118,203,884.51/312,400.18
  6. Step 6: Final answer
    x = 310,877.56

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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.