Home / 810,401.49-1,215,654.08-311,765.49

Finding the Fourth Proportional to 810,401.49, 1,215,654.08 and 311,765.49

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Solution

The fourth proportional to 810,401.49, 1,215,654.08 and 311,765.49 is: 467,668.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,401.49 : 1,215,654.08 = 311,765.49 : x
  2. Step 2: Convert to fraction form
    810,401.49/1,215,654.08 = 311,765.49/x
  3. Step 3: Cross multiply
    810,401.49x = 1,215,654.08 × 311,765.49
  4. Step 4: Simplify right side
    810,401.49x = 378,998,988,362.87
  5. Step 5: Solve for x
    x = 378,998,988,362.87/810,401.49
  6. Step 6: Final answer
    x = 467,668.18

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.