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Finding the Fourth Proportional to 805.19, 1,208.19 and 610.12

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Solution

The fourth proportional to 805.19, 1,208.19 and 610.12 is: 915.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.19 : 1,208.19 = 610.12 : x
  2. Step 2: Convert to fraction form
    805.19/1,208.19 = 610.12/x
  3. Step 3: Cross multiply
    805.19x = 1,208.19 × 610.12
  4. Step 4: Simplify right side
    805.19x = 737,140.88
  5. Step 5: Solve for x
    x = 737,140.88/805.19
  6. Step 6: Final answer
    x = 915.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.