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Finding the Fourth Proportional to 810.70, 1,118.55 and 461.38

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Solution

The fourth proportional to 810.70, 1,118.55 and 461.38 is: 636.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.70 : 1,118.55 = 461.38 : x
  2. Step 2: Convert to fraction form
    810.70/1,118.55 = 461.38/x
  3. Step 3: Cross multiply
    810.70x = 1,118.55 × 461.38
  4. Step 4: Simplify right side
    810.70x = 516,076.60
  5. Step 5: Solve for x
    x = 516,076.60/810.70
  6. Step 6: Final answer
    x = 636.58

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Half scale
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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.