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Finding the Fourth Proportional to 913.91, 1,370.03 and 336.65

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Solution

The fourth proportional to 913.91, 1,370.03 and 336.65 is: 504.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.91 : 1,370.03 = 336.65 : x
  2. Step 2: Convert to fraction form
    913.91/1,370.03 = 336.65/x
  3. Step 3: Cross multiply
    913.91x = 1,370.03 × 336.65
  4. Step 4: Simplify right side
    913.91x = 461,212.07
  5. Step 5: Solve for x
    x = 461,212.07/913.91
  6. Step 6: Final answer
    x = 504.66

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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.