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Finding the Fourth Proportional to 917.38, 1,376.04 and 552.25

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Solution

The fourth proportional to 917.38, 1,376.04 and 552.25 is: 828.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.38 : 1,376.04 = 552.25 : x
  2. Step 2: Convert to fraction form
    917.38/1,376.04 = 552.25/x
  3. Step 3: Cross multiply
    917.38x = 1,376.04 × 552.25
  4. Step 4: Simplify right side
    917.38x = 759,911.21
  5. Step 5: Solve for x
    x = 759,911.21/917.38
  6. Step 6: Final answer
    x = 828.35

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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.