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Finding the Fourth Proportional to 953.28, 1,428.30 and 760.50

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Solution

The fourth proportional to 953.28, 1,428.30 and 760.50 is: 1,139.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.28 : 1,428.30 = 760.50 : x
  2. Step 2: Convert to fraction form
    953.28/1,428.30 = 760.50/x
  3. Step 3: Cross multiply
    953.28x = 1,428.30 × 760.50
  4. Step 4: Simplify right side
    953.28x = 1,086,222.15
  5. Step 5: Solve for x
    x = 1,086,222.15/953.28
  6. Step 6: Final answer
    x = 1,139.46

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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.