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Finding the Fourth Proportional to 1,310.50, 1,808.47 and 751.30

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Solution

The fourth proportional to 1,310.50, 1,808.47 and 751.30 is: 1,036.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.50 : 1,808.47 = 751.30 : x
  2. Step 2: Convert to fraction form
    1,310.50/1,808.47 = 751.30/x
  3. Step 3: Cross multiply
    1,310.50x = 1,808.47 × 751.30
  4. Step 4: Simplify right side
    1,310.50x = 1,358,702.48
  5. Step 5: Solve for x
    x = 1,358,702.48/1,310.50
  6. Step 6: Final answer
    x = 1,036.78

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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.