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Finding the Fourth Proportional to 1,006.65, 1,506.74 and 519.03

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Solution

The fourth proportional to 1,006.65, 1,506.74 and 519.03 is: 776.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.65 : 1,506.74 = 519.03 : x
  2. Step 2: Convert to fraction form
    1,006.65/1,506.74 = 519.03/x
  3. Step 3: Cross multiply
    1,006.65x = 1,506.74 × 519.03
  4. Step 4: Simplify right side
    1,006.65x = 782,040.67
  5. Step 5: Solve for x
    x = 782,040.67/1,006.65
  6. Step 6: Final answer
    x = 776.87

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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.