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Finding the Fourth Proportional to 1,393.66, 2,090.80 and 469.14

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Solution

The fourth proportional to 1,393.66, 2,090.80 and 469.14 is: 703.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.66 : 2,090.80 = 469.14 : x
  2. Step 2: Convert to fraction form
    1,393.66/2,090.80 = 469.14/x
  3. Step 3: Cross multiply
    1,393.66x = 2,090.80 × 469.14
  4. Step 4: Simplify right side
    1,393.66x = 980,879.78
  5. Step 5: Solve for x
    x = 980,879.78/1,393.66
  6. Step 6: Final answer
    x = 703.82

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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.