Home / 1,316.51-1,974.81-439.09

Finding the Fourth Proportional to 1,316.51, 1,974.81 and 439.09

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Solution

The fourth proportional to 1,316.51, 1,974.81 and 439.09 is: 658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.51 : 1,974.81 = 439.09 : x
  2. Step 2: Convert to fraction form
    1,316.51/1,974.81 = 439.09/x
  3. Step 3: Cross multiply
    1,316.51x = 1,974.81 × 439.09
  4. Step 4: Simplify right side
    1,316.51x = 867,119.32
  5. Step 5: Solve for x
    x = 867,119.32/1,316.51
  6. Step 6: Final answer
    x = 658.65

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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.