Home / 691,805.40-954,546.30-420,016.38

Finding the Fourth Proportional to 691,805.40, 954,546.30 and 420,016.38

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Solution

The fourth proportional to 691,805.40, 954,546.30 and 420,016.38 is: 579,534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,805.40 : 954,546.30 = 420,016.38 : x
  2. Step 2: Convert to fraction form
    691,805.40/954,546.30 = 420,016.38/x
  3. Step 3: Cross multiply
    691,805.40x = 954,546.30 × 420,016.38
  4. Step 4: Simplify right side
    691,805.40x = 400,925,081,468.39
  5. Step 5: Solve for x
    x = 400,925,081,468.39/691,805.40
  6. Step 6: Final answer
    x = 579,534.48

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Double scale
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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.