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Finding the Fourth Proportional to 663,297.40, 994,703.10 and 214,136.20

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Solution

The fourth proportional to 663,297.40, 994,703.10 and 214,136.20 is: 321,125.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,297.40 : 994,703.10 = 214,136.20 : x
  2. Step 2: Convert to fraction form
    663,297.40/994,703.10 = 214,136.20/x
  3. Step 3: Cross multiply
    663,297.40x = 994,703.10 × 214,136.20
  4. Step 4: Simplify right side
    663,297.40x = 213,001,941,962.22
  5. Step 5: Solve for x
    x = 213,001,941,962.22/663,297.40
  6. Step 6: Final answer
    x = 321,125.85

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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.