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Finding the Fourth Proportional to 954.18, 1,428.84 and 769.50

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Solution

The fourth proportional to 954.18, 1,428.84 and 769.50 is: 1,152.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.18 : 1,428.84 = 769.50 : x
  2. Step 2: Convert to fraction form
    954.18/1,428.84 = 769.50/x
  3. Step 3: Cross multiply
    954.18x = 1,428.84 × 769.50
  4. Step 4: Simplify right side
    954.18x = 1,099,492.38
  5. Step 5: Solve for x
    x = 1,099,492.38/954.18
  6. Step 6: Final answer
    x = 1,152.29

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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.