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Finding the Fourth Proportional to 1,132.99, 1,698.67 and 439.06

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Solution

The fourth proportional to 1,132.99, 1,698.67 and 439.06 is: 658.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.99 : 1,698.67 = 439.06 : x
  2. Step 2: Convert to fraction form
    1,132.99/1,698.67 = 439.06/x
  3. Step 3: Cross multiply
    1,132.99x = 1,698.67 × 439.06
  4. Step 4: Simplify right side
    1,132.99x = 745,818.05
  5. Step 5: Solve for x
    x = 745,818.05/1,132.99
  6. Step 6: Final answer
    x = 658.27

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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.