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Finding the Fourth Proportional to 986.10, 1,478.22 and 336.37

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Solution

The fourth proportional to 986.10, 1,478.22 and 336.37 is: 504.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.10 : 1,478.22 = 336.37 : x
  2. Step 2: Convert to fraction form
    986.10/1,478.22 = 336.37/x
  3. Step 3: Cross multiply
    986.10x = 1,478.22 × 336.37
  4. Step 4: Simplify right side
    986.10x = 497,227.18
  5. Step 5: Solve for x
    x = 497,227.18/986.10
  6. Step 6: Final answer
    x = 504.24

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Double scale
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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.