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Finding the Fourth Proportional to 587.59, 810.61 and 388.37

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Solution

The fourth proportional to 587.59, 810.61 and 388.37 is: 535.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.59 : 810.61 = 388.37 : x
  2. Step 2: Convert to fraction form
    587.59/810.61 = 388.37/x
  3. Step 3: Cross multiply
    587.59x = 810.61 × 388.37
  4. Step 4: Simplify right side
    587.59x = 314,816.61
  5. Step 5: Solve for x
    x = 314,816.61/587.59
  6. Step 6: Final answer
    x = 535.78

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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.