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Finding the Fourth Proportional to 551.33, 760.87 and 315.35

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Solution

The fourth proportional to 551.33, 760.87 and 315.35 is: 435.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.33 : 760.87 = 315.35 : x
  2. Step 2: Convert to fraction form
    551.33/760.87 = 315.35/x
  3. Step 3: Cross multiply
    551.33x = 760.87 × 315.35
  4. Step 4: Simplify right side
    551.33x = 239,940.63
  5. Step 5: Solve for x
    x = 239,940.63/551.33
  6. Step 6: Final answer
    x = 435.20

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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.