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Finding the Fourth Proportional to 1,539.37, 2,309.06 and 385.12

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Solution

The fourth proportional to 1,539.37, 2,309.06 and 385.12 is: 577.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.37 : 2,309.06 = 385.12 : x
  2. Step 2: Convert to fraction form
    1,539.37/2,309.06 = 385.12/x
  3. Step 3: Cross multiply
    1,539.37x = 2,309.06 × 385.12
  4. Step 4: Simplify right side
    1,539.37x = 889,265.19
  5. Step 5: Solve for x
    x = 889,265.19/1,539.37
  6. Step 6: Final answer
    x = 577.68

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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.