Home / 1,039.05-1,558.47-309.09

Finding the Fourth Proportional to 1,039.05, 1,558.47 and 309.09

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Solution

The fourth proportional to 1,039.05, 1,558.47 and 309.09 is: 463.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.05 : 1,558.47 = 309.09 : x
  2. Step 2: Convert to fraction form
    1,039.05/1,558.47 = 309.09/x
  3. Step 3: Cross multiply
    1,039.05x = 1,558.47 × 309.09
  4. Step 4: Simplify right side
    1,039.05x = 481,707.49
  5. Step 5: Solve for x
    x = 481,707.49/1,039.05
  6. Step 6: Final answer
    x = 463.60

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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.