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Finding the Fourth Proportional to 992.23, 1,488.35 and 683.15

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Solution

The fourth proportional to 992.23, 1,488.35 and 683.15 is: 1,024.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.23 : 1,488.35 = 683.15 : x
  2. Step 2: Convert to fraction form
    992.23/1,488.35 = 683.15/x
  3. Step 3: Cross multiply
    992.23x = 1,488.35 × 683.15
  4. Step 4: Simplify right side
    992.23x = 1,016,762.89
  5. Step 5: Solve for x
    x = 1,016,762.89/992.23
  6. Step 6: Final answer
    x = 1,024.73

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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.