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Finding the Fourth Proportional to 553.89, 764.19 and 378.93

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Solution

The fourth proportional to 553.89, 764.19 and 378.93 is: 522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.89 : 764.19 = 378.93 : x
  2. Step 2: Convert to fraction form
    553.89/764.19 = 378.93/x
  3. Step 3: Cross multiply
    553.89x = 764.19 × 378.93
  4. Step 4: Simplify right side
    553.89x = 289,574.52
  5. Step 5: Solve for x
    x = 289,574.52/553.89
  6. Step 6: Final answer
    x = 522.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.