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Finding the Fourth Proportional to 675.15, 931.60 and 380.37

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Solution

The fourth proportional to 675.15, 931.60 and 380.37 is: 524.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.15 : 931.60 = 380.37 : x
  2. Step 2: Convert to fraction form
    675.15/931.60 = 380.37/x
  3. Step 3: Cross multiply
    675.15x = 931.60 × 380.37
  4. Step 4: Simplify right side
    675.15x = 354,352.69
  5. Step 5: Solve for x
    x = 354,352.69/675.15
  6. Step 6: Final answer
    x = 524.85

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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.