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Finding the Fourth Proportional to 1,005.52, 1,508.87 and 561.16

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Solution

The fourth proportional to 1,005.52, 1,508.87 and 561.16 is: 842.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.52 : 1,508.87 = 561.16 : x
  2. Step 2: Convert to fraction form
    1,005.52/1,508.87 = 561.16/x
  3. Step 3: Cross multiply
    1,005.52x = 1,508.87 × 561.16
  4. Step 4: Simplify right side
    1,005.52x = 846,709.94
  5. Step 5: Solve for x
    x = 846,709.94/1,005.52
  6. Step 6: Final answer
    x = 842.06

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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.