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Finding the Fourth Proportional to 448,090.70, 672,136.05 and 399,101.90

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Solution

The fourth proportional to 448,090.70, 672,136.05 and 399,101.90 is: 598,652.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,090.70 : 672,136.05 = 399,101.90 : x
  2. Step 2: Convert to fraction form
    448,090.70/672,136.05 = 399,101.90/x
  3. Step 3: Cross multiply
    448,090.70x = 672,136.05 × 399,101.90
  4. Step 4: Simplify right side
    448,090.70x = 268,250,774,613.50
  5. Step 5: Solve for x
    x = 268,250,774,613.50/448,090.70
  6. Step 6: Final answer
    x = 598,652.85

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Similar ratio
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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.