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Finding the Fourth Proportional to 503.77, 754.54 and 393.81

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Solution

The fourth proportional to 503.77, 754.54 and 393.81 is: 589.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.77 : 754.54 = 393.81 : x
  2. Step 2: Convert to fraction form
    503.77/754.54 = 393.81/x
  3. Step 3: Cross multiply
    503.77x = 754.54 × 393.81
  4. Step 4: Simplify right side
    503.77x = 297,145.40
  5. Step 5: Solve for x
    x = 297,145.40/503.77
  6. Step 6: Final answer
    x = 589.84

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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.