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Finding the Fourth Proportional to 918.14, 1,376.91 and 333.07

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Solution

The fourth proportional to 918.14, 1,376.91 and 333.07 is: 499.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.14 : 1,376.91 = 333.07 : x
  2. Step 2: Convert to fraction form
    918.14/1,376.91 = 333.07/x
  3. Step 3: Cross multiply
    918.14x = 1,376.91 × 333.07
  4. Step 4: Simplify right side
    918.14x = 458,603.97
  5. Step 5: Solve for x
    x = 458,603.97/918.14
  6. Step 6: Final answer
    x = 499.50

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Double scale
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1.5x scale

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.