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Finding the Fourth Proportional to 946.98, 1,420.38 and 576.69

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Solution

The fourth proportional to 946.98, 1,420.38 and 576.69 is: 864.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.98 : 1,420.38 = 576.69 : x
  2. Step 2: Convert to fraction form
    946.98/1,420.38 = 576.69/x
  3. Step 3: Cross multiply
    946.98x = 1,420.38 × 576.69
  4. Step 4: Simplify right side
    946.98x = 819,115.24
  5. Step 5: Solve for x
    x = 819,115.24/946.98
  6. Step 6: Final answer
    x = 864.98

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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.