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Finding the Fourth Proportional to 917.52, 1,376.40 and 552.24

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Solution

The fourth proportional to 917.52, 1,376.40 and 552.24 is: 828.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.52 : 1,376.40 = 552.24 : x
  2. Step 2: Convert to fraction form
    917.52/1,376.40 = 552.24/x
  3. Step 3: Cross multiply
    917.52x = 1,376.40 × 552.24
  4. Step 4: Simplify right side
    917.52x = 760,103.14
  5. Step 5: Solve for x
    x = 760,103.14/917.52
  6. Step 6: Final answer
    x = 828.43

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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.