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Finding the Fourth Proportional to 1,181.58, 1,779.24 and 875.60

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Solution

The fourth proportional to 1,181.58, 1,779.24 and 875.60 is: 1,318.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,181.58 : 1,779.24 = 875.60 : x
  2. Step 2: Convert to fraction form
    1,181.58/1,779.24 = 875.60/x
  3. Step 3: Cross multiply
    1,181.58x = 1,779.24 × 875.60
  4. Step 4: Simplify right side
    1,181.58x = 1,557,898.17
  5. Step 5: Solve for x
    x = 1,557,898.17/1,181.58
  6. Step 6: Final answer
    x = 1,318.49

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.