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Finding the Fourth Proportional to 1,390.81, 2,086.22 and 466.34

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Solution

The fourth proportional to 1,390.81, 2,086.22 and 466.34 is: 699.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.81 : 2,086.22 = 466.34 : x
  2. Step 2: Convert to fraction form
    1,390.81/2,086.22 = 466.34/x
  3. Step 3: Cross multiply
    1,390.81x = 2,086.22 × 466.34
  4. Step 4: Simplify right side
    1,390.81x = 972,887.83
  5. Step 5: Solve for x
    x = 972,887.83/1,390.81
  6. Step 6: Final answer
    x = 699.51

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Double scale
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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.