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Finding the Fourth Proportional to 1,020.11, 1,530.12 and 558.10

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Solution

The fourth proportional to 1,020.11, 1,530.12 and 558.10 is: 837.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.11 : 1,530.12 = 558.10 : x
  2. Step 2: Convert to fraction form
    1,020.11/1,530.12 = 558.10/x
  3. Step 3: Cross multiply
    1,020.11x = 1,530.12 × 558.10
  4. Step 4: Simplify right side
    1,020.11x = 853,963.98
  5. Step 5: Solve for x
    x = 853,963.98/1,020.11
  6. Step 6: Final answer
    x = 837.13

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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.