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Finding the Fourth Proportional to 884.15, 1,220.15 and 506.02

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Solution

The fourth proportional to 884.15, 1,220.15 and 506.02 is: 698.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.15 : 1,220.15 = 506.02 : x
  2. Step 2: Convert to fraction form
    884.15/1,220.15 = 506.02/x
  3. Step 3: Cross multiply
    884.15x = 1,220.15 × 506.02
  4. Step 4: Simplify right side
    884.15x = 617,420.30
  5. Step 5: Solve for x
    x = 617,420.30/884.15
  6. Step 6: Final answer
    x = 698.32

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Double scale
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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.