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Finding the Fourth Proportional to 936.56, 1,404.77 and 388.76

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Solution

The fourth proportional to 936.56, 1,404.77 and 388.76 is: 583.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.56 : 1,404.77 = 388.76 : x
  2. Step 2: Convert to fraction form
    936.56/1,404.77 = 388.76/x
  3. Step 3: Cross multiply
    936.56x = 1,404.77 × 388.76
  4. Step 4: Simplify right side
    936.56x = 546,109.42
  5. Step 5: Solve for x
    x = 546,109.42/936.56
  6. Step 6: Final answer
    x = 583.10

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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.