Home / 810,476.76-1,215,715.16-311,724.12

Finding the Fourth Proportional to 810,476.76, 1,215,715.16 and 311,724.12

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Solution

The fourth proportional to 810,476.76, 1,215,715.16 and 311,724.12 is: 467,586.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,476.76 : 1,215,715.16 = 311,724.12 : x
  2. Step 2: Convert to fraction form
    810,476.76/1,215,715.16 = 311,724.12/x
  3. Step 3: Cross multiply
    810,476.76x = 1,215,715.16 × 311,724.12
  4. Step 4: Simplify right side
    810,476.76x = 378,967,738,421.66
  5. Step 5: Solve for x
    x = 378,967,738,421.66/810,476.76
  6. Step 6: Final answer
    x = 467,586.19

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Double scale
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Similar ratio
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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.