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Finding the Fourth Proportional to 1,539.87, 2,309.79 and 444.31

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Solution

The fourth proportional to 1,539.87, 2,309.79 and 444.31 is: 666.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.87 : 2,309.79 = 444.31 : x
  2. Step 2: Convert to fraction form
    1,539.87/2,309.79 = 444.31/x
  3. Step 3: Cross multiply
    1,539.87x = 2,309.79 × 444.31
  4. Step 4: Simplify right side
    1,539.87x = 1,026,262.79
  5. Step 5: Solve for x
    x = 1,026,262.79/1,539.87
  6. Step 6: Final answer
    x = 666.46

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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.