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Finding the Fourth Proportional to 693.36, 1,039.87 and 322.93

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Solution

The fourth proportional to 693.36, 1,039.87 and 322.93 is: 484.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.36 : 1,039.87 = 322.93 : x
  2. Step 2: Convert to fraction form
    693.36/1,039.87 = 322.93/x
  3. Step 3: Cross multiply
    693.36x = 1,039.87 × 322.93
  4. Step 4: Simplify right side
    693.36x = 335,807.53
  5. Step 5: Solve for x
    x = 335,807.53/693.36
  6. Step 6: Final answer
    x = 484.32

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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.