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Finding the Fourth Proportional to 902.84, 1,352.08 and 613.40

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Solution

The fourth proportional to 902.84, 1,352.08 and 613.40 is: 918.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.84 : 1,352.08 = 613.40 : x
  2. Step 2: Convert to fraction form
    902.84/1,352.08 = 613.40/x
  3. Step 3: Cross multiply
    902.84x = 1,352.08 × 613.40
  4. Step 4: Simplify right side
    902.84x = 829,365.87
  5. Step 5: Solve for x
    x = 829,365.87/902.84
  6. Step 6: Final answer
    x = 918.62

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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.