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Finding the Fourth Proportional to 884.42, 1,220.34 and 511.26

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Solution

The fourth proportional to 884.42, 1,220.34 and 511.26 is: 705.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.42 : 1,220.34 = 511.26 : x
  2. Step 2: Convert to fraction form
    884.42/1,220.34 = 511.26/x
  3. Step 3: Cross multiply
    884.42x = 1,220.34 × 511.26
  4. Step 4: Simplify right side
    884.42x = 623,913.80
  5. Step 5: Solve for x
    x = 623,913.80/884.42
  6. Step 6: Final answer
    x = 705.45

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1.5x scale

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.