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Finding the Fourth Proportional to 935.52, 1,290.57 and 620.93

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Solution

The fourth proportional to 935.52, 1,290.57 and 620.93 is: 856.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.52 : 1,290.57 = 620.93 : x
  2. Step 2: Convert to fraction form
    935.52/1,290.57 = 620.93/x
  3. Step 3: Cross multiply
    935.52x = 1,290.57 × 620.93
  4. Step 4: Simplify right side
    935.52x = 801,354.53
  5. Step 5: Solve for x
    x = 801,354.53/935.52
  6. Step 6: Final answer
    x = 856.59

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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.