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Finding the Fourth Proportional to 946.91, 1,420.50 and 330.47

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Solution

The fourth proportional to 946.91, 1,420.50 and 330.47 is: 495.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.91 : 1,420.50 = 330.47 : x
  2. Step 2: Convert to fraction form
    946.91/1,420.50 = 330.47/x
  3. Step 3: Cross multiply
    946.91x = 1,420.50 × 330.47
  4. Step 4: Simplify right side
    946.91x = 469,432.10
  5. Step 5: Solve for x
    x = 469,432.10/946.91
  6. Step 6: Final answer
    x = 495.75

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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.