Home / 1,316.45-1,974.98-439.02

Finding the Fourth Proportional to 1,316.45, 1,974.98 and 439.02

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Solution

The fourth proportional to 1,316.45, 1,974.98 and 439.02 is: 658.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.45 : 1,974.98 = 439.02 : x
  2. Step 2: Convert to fraction form
    1,316.45/1,974.98 = 439.02/x
  3. Step 3: Cross multiply
    1,316.45x = 1,974.98 × 439.02
  4. Step 4: Simplify right side
    1,316.45x = 867,056.82
  5. Step 5: Solve for x
    x = 867,056.82/1,316.45
  6. Step 6: Final answer
    x = 658.63

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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.