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Finding the Fourth Proportional to 954.55, 1,429.49 and 661.29

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Solution

The fourth proportional to 954.55, 1,429.49 and 661.29 is: 990.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.55 : 1,429.49 = 661.29 : x
  2. Step 2: Convert to fraction form
    954.55/1,429.49 = 661.29/x
  3. Step 3: Cross multiply
    954.55x = 1,429.49 × 661.29
  4. Step 4: Simplify right side
    954.55x = 945,296.99
  5. Step 5: Solve for x
    x = 945,296.99/954.55
  6. Step 6: Final answer
    x = 990.31

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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.