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Finding the Fourth Proportional to 551.18, 756.58 and 501.77

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Solution

The fourth proportional to 551.18, 756.58 and 501.77 is: 688.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.18 : 756.58 = 501.77 : x
  2. Step 2: Convert to fraction form
    551.18/756.58 = 501.77/x
  3. Step 3: Cross multiply
    551.18x = 756.58 × 501.77
  4. Step 4: Simplify right side
    551.18x = 379,629.15
  5. Step 5: Solve for x
    x = 379,629.15/551.18
  6. Step 6: Final answer
    x = 688.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.