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Finding the Fourth Proportional to 1,006.12, 1,509.03 and 518.91

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Solution

The fourth proportional to 1,006.12, 1,509.03 and 518.91 is: 778.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.12 : 1,509.03 = 518.91 : x
  2. Step 2: Convert to fraction form
    1,006.12/1,509.03 = 518.91/x
  3. Step 3: Cross multiply
    1,006.12x = 1,509.03 × 518.91
  4. Step 4: Simplify right side
    1,006.12x = 783,045.10
  5. Step 5: Solve for x
    x = 783,045.10/1,006.12
  6. Step 6: Final answer
    x = 778.28

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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.