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Finding the Fourth Proportional to 937.17, 1,405.76 and 388.75

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Solution

The fourth proportional to 937.17, 1,405.76 and 388.75 is: 583.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.17 : 1,405.76 = 388.75 : x
  2. Step 2: Convert to fraction form
    937.17/1,405.76 = 388.75/x
  3. Step 3: Cross multiply
    937.17x = 1,405.76 × 388.75
  4. Step 4: Simplify right side
    937.17x = 546,489.20
  5. Step 5: Solve for x
    x = 546,489.20/937.17
  6. Step 6: Final answer
    x = 583.13

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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.