Home / 1,539.50-2,309.09-385.25

Finding the Fourth Proportional to 1,539.50, 2,309.09 and 385.25

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Solution

The fourth proportional to 1,539.50, 2,309.09 and 385.25 is: 577.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.50 : 2,309.09 = 385.25 : x
  2. Step 2: Convert to fraction form
    1,539.50/2,309.09 = 385.25/x
  3. Step 3: Cross multiply
    1,539.50x = 2,309.09 × 385.25
  4. Step 4: Simplify right side
    1,539.50x = 889,563.45
  5. Step 5: Solve for x
    x = 889,563.45/1,539.50
  6. Step 6: Final answer
    x = 577.83

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Double scale
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1.5x scale

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.