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Finding the Fourth Proportional to 1,035.48, 1,553.27 and 386.13

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Solution

The fourth proportional to 1,035.48, 1,553.27 and 386.13 is: 579.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.48 : 1,553.27 = 386.13 : x
  2. Step 2: Convert to fraction form
    1,035.48/1,553.27 = 386.13/x
  3. Step 3: Cross multiply
    1,035.48x = 1,553.27 × 386.13
  4. Step 4: Simplify right side
    1,035.48x = 599,762.21
  5. Step 5: Solve for x
    x = 599,762.21/1,035.48
  6. Step 6: Final answer
    x = 579.21

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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.