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Finding the Fourth Proportional to 1,020.66, 1,530.17 and 443.13

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Solution

The fourth proportional to 1,020.66, 1,530.17 and 443.13 is: 664.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.66 : 1,530.17 = 443.13 : x
  2. Step 2: Convert to fraction form
    1,020.66/1,530.17 = 443.13/x
  3. Step 3: Cross multiply
    1,020.66x = 1,530.17 × 443.13
  4. Step 4: Simplify right side
    1,020.66x = 678,064.23
  5. Step 5: Solve for x
    x = 678,064.23/1,020.66
  6. Step 6: Final answer
    x = 664.34

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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.