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Finding the Fourth Proportional to 661.14, 911.94 and 530.46

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Solution

The fourth proportional to 661.14, 911.94 and 530.46 is: 731.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.14 : 911.94 = 530.46 : x
  2. Step 2: Convert to fraction form
    661.14/911.94 = 530.46/x
  3. Step 3: Cross multiply
    661.14x = 911.94 × 530.46
  4. Step 4: Simplify right side
    661.14x = 483,747.69
  5. Step 5: Solve for x
    x = 483,747.69/661.14
  6. Step 6: Final answer
    x = 731.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.