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Finding the Fourth Proportional to 1,035.42, 1,553.16 and 386.03

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Solution

The fourth proportional to 1,035.42, 1,553.16 and 386.03 is: 579.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.42 : 1,553.16 = 386.03 : x
  2. Step 2: Convert to fraction form
    1,035.42/1,553.16 = 386.03/x
  3. Step 3: Cross multiply
    1,035.42x = 1,553.16 × 386.03
  4. Step 4: Simplify right side
    1,035.42x = 599,556.66
  5. Step 5: Solve for x
    x = 599,556.66/1,035.42
  6. Step 6: Final answer
    x = 579.05

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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.