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Finding the Fourth Proportional to 1,018.51, 1,528.23 and 629.11

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Solution

The fourth proportional to 1,018.51, 1,528.23 and 629.11 is: 943.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.51 : 1,528.23 = 629.11 : x
  2. Step 2: Convert to fraction form
    1,018.51/1,528.23 = 629.11/x
  3. Step 3: Cross multiply
    1,018.51x = 1,528.23 × 629.11
  4. Step 4: Simplify right side
    1,018.51x = 961,424.78
  5. Step 5: Solve for x
    x = 961,424.78/1,018.51
  6. Step 6: Final answer
    x = 943.95

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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.