Home / 306,729.45-423,452.66-215,129.97

Finding the Fourth Proportional to 306,729.45, 423,452.66 and 215,129.97

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Solution

The fourth proportional to 306,729.45, 423,452.66 and 215,129.97 is: 296,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,729.45 : 423,452.66 = 215,129.97 : x
  2. Step 2: Convert to fraction form
    306,729.45/423,452.66 = 215,129.97/x
  3. Step 3: Cross multiply
    306,729.45x = 423,452.66 × 215,129.97
  4. Step 4: Simplify right side
    306,729.45x = 91,097,356,966.57
  5. Step 5: Solve for x
    x = 91,097,356,966.57/306,729.45
  6. Step 6: Final answer
    x = 296,995.80

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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.