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Finding the Fourth Proportional to 611.18, 841.74 and 528.26

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Solution

The fourth proportional to 611.18, 841.74 and 528.26 is: 727.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.18 : 841.74 = 528.26 : x
  2. Step 2: Convert to fraction form
    611.18/841.74 = 528.26/x
  3. Step 3: Cross multiply
    611.18x = 841.74 × 528.26
  4. Step 4: Simplify right side
    611.18x = 444,657.57
  5. Step 5: Solve for x
    x = 444,657.57/611.18
  6. Step 6: Final answer
    x = 727.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.