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Finding the Fourth Proportional to 1,035.54, 1,553.77 and 386.32

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Solution

The fourth proportional to 1,035.54, 1,553.77 and 386.32 is: 579.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.54 : 1,553.77 = 386.32 : x
  2. Step 2: Convert to fraction form
    1,035.54/1,553.77 = 386.32/x
  3. Step 3: Cross multiply
    1,035.54x = 1,553.77 × 386.32
  4. Step 4: Simplify right side
    1,035.54x = 600,252.43
  5. Step 5: Solve for x
    x = 600,252.43/1,035.54
  6. Step 6: Final answer
    x = 579.65

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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.