Home / 1,020.04-1,516.31-990.11

Finding the Fourth Proportional to 1,020.04, 1,516.31 and 990.11

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Solution

The fourth proportional to 1,020.04, 1,516.31 and 990.11 is: 1,471.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.04 : 1,516.31 = 990.11 : x
  2. Step 2: Convert to fraction form
    1,020.04/1,516.31 = 990.11/x
  3. Step 3: Cross multiply
    1,020.04x = 1,516.31 × 990.11
  4. Step 4: Simplify right side
    1,020.04x = 1,501,307.43
  5. Step 5: Solve for x
    x = 1,501,307.43/1,020.04
  6. Step 6: Final answer
    x = 1,471.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.