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Finding the Fourth Proportional to 935.78, 1,403.71 and 277.66

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Solution

The fourth proportional to 935.78, 1,403.71 and 277.66 is: 416.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.78 : 1,403.71 = 277.66 : x
  2. Step 2: Convert to fraction form
    935.78/1,403.71 = 277.66/x
  3. Step 3: Cross multiply
    935.78x = 1,403.71 × 277.66
  4. Step 4: Simplify right side
    935.78x = 389,749.92
  5. Step 5: Solve for x
    x = 389,749.92/935.78
  6. Step 6: Final answer
    x = 416.50

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Double scale
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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.