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Finding the Fourth Proportional to 661.53, 914.66 and 579.54

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Solution

The fourth proportional to 661.53, 914.66 and 579.54 is: 801.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.53 : 914.66 = 579.54 : x
  2. Step 2: Convert to fraction form
    661.53/914.66 = 579.54/x
  3. Step 3: Cross multiply
    661.53x = 914.66 × 579.54
  4. Step 4: Simplify right side
    661.53x = 530,082.06
  5. Step 5: Solve for x
    x = 530,082.06/661.53
  6. Step 6: Final answer
    x = 801.30

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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.