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Finding the Fourth Proportional to 1,911.44, 2,866.48 and 870.58

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Solution

The fourth proportional to 1,911.44, 2,866.48 and 870.58 is: 1,305.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.44 : 2,866.48 = 870.58 : x
  2. Step 2: Convert to fraction form
    1,911.44/2,866.48 = 870.58/x
  3. Step 3: Cross multiply
    1,911.44x = 2,866.48 × 870.58
  4. Step 4: Simplify right side
    1,911.44x = 2,495,500.16
  5. Step 5: Solve for x
    x = 2,495,500.16/1,911.44
  6. Step 6: Final answer
    x = 1,305.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.