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Finding the Fourth Proportional to 404.94, 558.84 and 306.53

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Solution

The fourth proportional to 404.94, 558.84 and 306.53 is: 423.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.94 : 558.84 = 306.53 : x
  2. Step 2: Convert to fraction form
    404.94/558.84 = 306.53/x
  3. Step 3: Cross multiply
    404.94x = 558.84 × 306.53
  4. Step 4: Simplify right side
    404.94x = 171,301.23
  5. Step 5: Solve for x
    x = 171,301.23/404.94
  6. Step 6: Final answer
    x = 423.03

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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.