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Finding the Fourth Proportional to 1,011.45, 1,515.03 and 523.02

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Solution

The fourth proportional to 1,011.45, 1,515.03 and 523.02 is: 783.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.45 : 1,515.03 = 523.02 : x
  2. Step 2: Convert to fraction form
    1,011.45/1,515.03 = 523.02/x
  3. Step 3: Cross multiply
    1,011.45x = 1,515.03 × 523.02
  4. Step 4: Simplify right side
    1,011.45x = 792,390.99
  5. Step 5: Solve for x
    x = 792,390.99/1,011.45
  6. Step 6: Final answer
    x = 783.42

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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.