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Finding the Fourth Proportional to 810.92, 1,119.10 and 461.72

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Solution

The fourth proportional to 810.92, 1,119.10 and 461.72 is: 637.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.92 : 1,119.10 = 461.72 : x
  2. Step 2: Convert to fraction form
    810.92/1,119.10 = 461.72/x
  3. Step 3: Cross multiply
    810.92x = 1,119.10 × 461.72
  4. Step 4: Simplify right side
    810.92x = 516,710.85
  5. Step 5: Solve for x
    x = 516,710.85/810.92
  6. Step 6: Final answer
    x = 637.19

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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.