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Finding the Fourth Proportional to 946.38, 1,305.50 and 651.80

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Solution

The fourth proportional to 946.38, 1,305.50 and 651.80 is: 899.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.38 : 1,305.50 = 651.80 : x
  2. Step 2: Convert to fraction form
    946.38/1,305.50 = 651.80/x
  3. Step 3: Cross multiply
    946.38x = 1,305.50 × 651.80
  4. Step 4: Simplify right side
    946.38x = 850,924.90
  5. Step 5: Solve for x
    x = 850,924.90/946.38
  6. Step 6: Final answer
    x = 899.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.