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Finding the Fourth Proportional to 1,005.59, 1,387.35 and 795.80

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Solution

The fourth proportional to 1,005.59, 1,387.35 and 795.80 is: 1,097.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.59 : 1,387.35 = 795.80 : x
  2. Step 2: Convert to fraction form
    1,005.59/1,387.35 = 795.80/x
  3. Step 3: Cross multiply
    1,005.59x = 1,387.35 × 795.80
  4. Step 4: Simplify right side
    1,005.59x = 1,104,046.19
  5. Step 5: Solve for x
    x = 1,104,046.19/1,005.59
  6. Step 6: Final answer
    x = 1,097.91

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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.