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Finding the Fourth Proportional to 935.49, 1,403.22 and 415.35

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Solution

The fourth proportional to 935.49, 1,403.22 and 415.35 is: 623.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.49 : 1,403.22 = 415.35 : x
  2. Step 2: Convert to fraction form
    935.49/1,403.22 = 415.35/x
  3. Step 3: Cross multiply
    935.49x = 1,403.22 × 415.35
  4. Step 4: Simplify right side
    935.49x = 582,826.65
  5. Step 5: Solve for x
    x = 582,826.65/935.49
  6. Step 6: Final answer
    x = 623.02

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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.