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Finding the Fourth Proportional to 1,316.50, 1,974.76 and 404.50

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Solution

The fourth proportional to 1,316.50, 1,974.76 and 404.50 is: 606.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.50 : 1,974.76 = 404.50 : x
  2. Step 2: Convert to fraction form
    1,316.50/1,974.76 = 404.50/x
  3. Step 3: Cross multiply
    1,316.50x = 1,974.76 × 404.50
  4. Step 4: Simplify right side
    1,316.50x = 798,790.42
  5. Step 5: Solve for x
    x = 798,790.42/1,316.50
  6. Step 6: Final answer
    x = 606.75

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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.