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Finding the Fourth Proportional to 1,089.02, 1,633.53 and 395.85

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Solution

The fourth proportional to 1,089.02, 1,633.53 and 395.85 is: 593.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.02 : 1,633.53 = 395.85 : x
  2. Step 2: Convert to fraction form
    1,089.02/1,633.53 = 395.85/x
  3. Step 3: Cross multiply
    1,089.02x = 1,633.53 × 395.85
  4. Step 4: Simplify right side
    1,089.02x = 646,625.24
  5. Step 5: Solve for x
    x = 646,625.24/1,089.02
  6. Step 6: Final answer
    x = 593.77

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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.