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Finding the Fourth Proportional to 946.84, 1,419.69 and 391.12

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Solution

The fourth proportional to 946.84, 1,419.69 and 391.12 is: 586.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.84 : 1,419.69 = 391.12 : x
  2. Step 2: Convert to fraction form
    946.84/1,419.69 = 391.12/x
  3. Step 3: Cross multiply
    946.84x = 1,419.69 × 391.12
  4. Step 4: Simplify right side
    946.84x = 555,260.10
  5. Step 5: Solve for x
    x = 555,260.10/946.84
  6. Step 6: Final answer
    x = 586.44

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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.