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Finding the Fourth Proportional to 937.58, 1,293.03 and 639.30

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Solution

The fourth proportional to 937.58, 1,293.03 and 639.30 is: 881.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.58 : 1,293.03 = 639.30 : x
  2. Step 2: Convert to fraction form
    937.58/1,293.03 = 639.30/x
  3. Step 3: Cross multiply
    937.58x = 1,293.03 × 639.30
  4. Step 4: Simplify right side
    937.58x = 826,634.08
  5. Step 5: Solve for x
    x = 826,634.08/937.58
  6. Step 6: Final answer
    x = 881.67

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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.