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Finding the Fourth Proportional to 1,310.58, 1,808.61 and 751.08

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Solution

The fourth proportional to 1,310.58, 1,808.61 and 751.08 is: 1,036.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.58 : 1,808.61 = 751.08 : x
  2. Step 2: Convert to fraction form
    1,310.58/1,808.61 = 751.08/x
  3. Step 3: Cross multiply
    1,310.58x = 1,808.61 × 751.08
  4. Step 4: Simplify right side
    1,310.58x = 1,358,410.80
  5. Step 5: Solve for x
    x = 1,358,410.80/1,310.58
  6. Step 6: Final answer
    x = 1,036.50

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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.