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Finding the Fourth Proportional to 505.98, 757.58 and 383.90

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Solution

The fourth proportional to 505.98, 757.58 and 383.90 is: 574.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.98 : 757.58 = 383.90 : x
  2. Step 2: Convert to fraction form
    505.98/757.58 = 383.90/x
  3. Step 3: Cross multiply
    505.98x = 757.58 × 383.90
  4. Step 4: Simplify right side
    505.98x = 290,834.96
  5. Step 5: Solve for x
    x = 290,834.96/505.98
  6. Step 6: Final answer
    x = 574.80

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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.