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Finding the Fourth Proportional to 584.61, 807.09 and 388.39

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Solution

The fourth proportional to 584.61, 807.09 and 388.39 is: 536.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.61 : 807.09 = 388.39 : x
  2. Step 2: Convert to fraction form
    584.61/807.09 = 388.39/x
  3. Step 3: Cross multiply
    584.61x = 807.09 × 388.39
  4. Step 4: Simplify right side
    584.61x = 313,465.69
  5. Step 5: Solve for x
    x = 313,465.69/584.61
  6. Step 6: Final answer
    x = 536.20

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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.