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Finding the Fourth Proportional to 551.88, 761.46 and 315.83

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Solution

The fourth proportional to 551.88, 761.46 and 315.83 is: 435.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.88 : 761.46 = 315.83 : x
  2. Step 2: Convert to fraction form
    551.88/761.46 = 315.83/x
  3. Step 3: Cross multiply
    551.88x = 761.46 × 315.83
  4. Step 4: Simplify right side
    551.88x = 240,488.10
  5. Step 5: Solve for x
    x = 240,488.10/551.88
  6. Step 6: Final answer
    x = 435.76

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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.