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Finding the Fourth Proportional to 935.89, 1,290.54 and 603.66

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Solution

The fourth proportional to 935.89, 1,290.54 and 603.66 is: 832.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.89 : 1,290.54 = 603.66 : x
  2. Step 2: Convert to fraction form
    935.89/1,290.54 = 603.66/x
  3. Step 3: Cross multiply
    935.89x = 1,290.54 × 603.66
  4. Step 4: Simplify right side
    935.89x = 779,047.38
  5. Step 5: Solve for x
    x = 779,047.38/935.89
  6. Step 6: Final answer
    x = 832.41

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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.