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Finding the Fourth Proportional to 920.55, 1,381.37 and 335.50

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Solution

The fourth proportional to 920.55, 1,381.37 and 335.50 is: 503.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.55 : 1,381.37 = 335.50 : x
  2. Step 2: Convert to fraction form
    920.55/1,381.37 = 335.50/x
  3. Step 3: Cross multiply
    920.55x = 1,381.37 × 335.50
  4. Step 4: Simplify right side
    920.55x = 463,449.64
  5. Step 5: Solve for x
    x = 463,449.64/920.55
  6. Step 6: Final answer
    x = 503.45

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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.