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Finding the Fourth Proportional to 996.99, 1,495.49 and 420.27

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Solution

The fourth proportional to 996.99, 1,495.49 and 420.27 is: 630.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.99 : 1,495.49 = 420.27 : x
  2. Step 2: Convert to fraction form
    996.99/1,495.49 = 420.27/x
  3. Step 3: Cross multiply
    996.99x = 1,495.49 × 420.27
  4. Step 4: Simplify right side
    996.99x = 628,509.58
  5. Step 5: Solve for x
    x = 628,509.58/996.99
  6. Step 6: Final answer
    x = 630.41

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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.