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Finding the Fourth Proportional to 503.10, 691.98 and 404.64

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Solution

The fourth proportional to 503.10, 691.98 and 404.64 is: 556.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.10 : 691.98 = 404.64 : x
  2. Step 2: Convert to fraction form
    503.10/691.98 = 404.64/x
  3. Step 3: Cross multiply
    503.10x = 691.98 × 404.64
  4. Step 4: Simplify right side
    503.10x = 280,002.79
  5. Step 5: Solve for x
    x = 280,002.79/503.10
  6. Step 6: Final answer
    x = 556.55

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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.