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Finding the Fourth Proportional to 1,393.90, 2,090.22 and 527.60

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Solution

The fourth proportional to 1,393.90, 2,090.22 and 527.60 is: 791.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.90 : 2,090.22 = 527.60 : x
  2. Step 2: Convert to fraction form
    1,393.90/2,090.22 = 527.60/x
  3. Step 3: Cross multiply
    1,393.90x = 2,090.22 × 527.60
  4. Step 4: Simplify right side
    1,393.90x = 1,102,800.07
  5. Step 5: Solve for x
    x = 1,102,800.07/1,393.90
  6. Step 6: Final answer
    x = 791.16

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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.