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Finding the Fourth Proportional to 675.14, 931.56 and 380.39

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Solution

The fourth proportional to 675.14, 931.56 and 380.39 is: 524.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.14 : 931.56 = 380.39 : x
  2. Step 2: Convert to fraction form
    675.14/931.56 = 380.39/x
  3. Step 3: Cross multiply
    675.14x = 931.56 × 380.39
  4. Step 4: Simplify right side
    675.14x = 354,351.45
  5. Step 5: Solve for x
    x = 354,351.45/675.14
  6. Step 6: Final answer
    x = 524.86

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1.5x scale

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.