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Finding the Fourth Proportional to 946.80, 1,305.45 and 836.10

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Solution

The fourth proportional to 946.80, 1,305.45 and 836.10 is: 1,152.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.80 : 1,305.45 = 836.10 : x
  2. Step 2: Convert to fraction form
    946.80/1,305.45 = 836.10/x
  3. Step 3: Cross multiply
    946.80x = 1,305.45 × 836.10
  4. Step 4: Simplify right side
    946.80x = 1,091,486.75
  5. Step 5: Solve for x
    x = 1,091,486.75/946.80
  6. Step 6: Final answer
    x = 1,152.82

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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.