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Finding the Fourth Proportional to 920.58, 1,381.32 and 373.16

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Solution

The fourth proportional to 920.58, 1,381.32 and 373.16 is: 559.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.58 : 1,381.32 = 373.16 : x
  2. Step 2: Convert to fraction form
    920.58/1,381.32 = 373.16/x
  3. Step 3: Cross multiply
    920.58x = 1,381.32 × 373.16
  4. Step 4: Simplify right side
    920.58x = 515,446.46
  5. Step 5: Solve for x
    x = 515,446.46/920.58
  6. Step 6: Final answer
    x = 559.91

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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.