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Finding the Fourth Proportional to 551.26, 760.69 and 403.98

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Solution

The fourth proportional to 551.26, 760.69 and 403.98 is: 557.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.26 : 760.69 = 403.98 : x
  2. Step 2: Convert to fraction form
    551.26/760.69 = 403.98/x
  3. Step 3: Cross multiply
    551.26x = 760.69 × 403.98
  4. Step 4: Simplify right side
    551.26x = 307,303.55
  5. Step 5: Solve for x
    x = 307,303.55/551.26
  6. Step 6: Final answer
    x = 557.46

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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.