Home / 428,111.17-591,190.53-320,494.34

Finding the Fourth Proportional to 428,111.17, 591,190.53 and 320,494.34

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Solution

The fourth proportional to 428,111.17, 591,190.53 and 320,494.34 is: 442,579.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,111.17 : 591,190.53 = 320,494.34 : x
  2. Step 2: Convert to fraction form
    428,111.17/591,190.53 = 320,494.34/x
  3. Step 3: Cross multiply
    428,111.17x = 591,190.53 × 320,494.34
  4. Step 4: Simplify right side
    428,111.17x = 189,473,218,726.60
  5. Step 5: Solve for x
    x = 189,473,218,726.60/428,111.17
  6. Step 6: Final answer
    x = 442,579.48

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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.