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Finding the Fourth Proportional to 920.18, 1,379.38 and 590.19

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Solution

The fourth proportional to 920.18, 1,379.38 and 590.19 is: 884.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.18 : 1,379.38 = 590.19 : x
  2. Step 2: Convert to fraction form
    920.18/1,379.38 = 590.19/x
  3. Step 3: Cross multiply
    920.18x = 1,379.38 × 590.19
  4. Step 4: Simplify right side
    920.18x = 814,090.74
  5. Step 5: Solve for x
    x = 814,090.74/920.18
  6. Step 6: Final answer
    x = 884.71

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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.