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Finding the Fourth Proportional to 404.61, 607.46 and 388.17

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Solution

The fourth proportional to 404.61, 607.46 and 388.17 is: 582.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.61 : 607.46 = 388.17 : x
  2. Step 2: Convert to fraction form
    404.61/607.46 = 388.17/x
  3. Step 3: Cross multiply
    404.61x = 607.46 × 388.17
  4. Step 4: Simplify right side
    404.61x = 235,795.81
  5. Step 5: Solve for x
    x = 235,795.81/404.61
  6. Step 6: Final answer
    x = 582.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.