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Finding the Fourth Proportional to 1,324.99, 1,987.26 and 351.19

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Solution

The fourth proportional to 1,324.99, 1,987.26 and 351.19 is: 526.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.99 : 1,987.26 = 351.19 : x
  2. Step 2: Convert to fraction form
    1,324.99/1,987.26 = 351.19/x
  3. Step 3: Cross multiply
    1,324.99x = 1,987.26 × 351.19
  4. Step 4: Simplify right side
    1,324.99x = 697,905.84
  5. Step 5: Solve for x
    x = 697,905.84/1,324.99
  6. Step 6: Final answer
    x = 526.73

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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.