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Finding the Fourth Proportional to 399,136.60, 598,704.90 and 118,617.40

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Solution

The fourth proportional to 399,136.60, 598,704.90 and 118,617.40 is: 177,926.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,136.60 : 598,704.90 = 118,617.40 : x
  2. Step 2: Convert to fraction form
    399,136.60/598,704.90 = 118,617.40/x
  3. Step 3: Cross multiply
    399,136.60x = 598,704.90 × 118,617.40
  4. Step 4: Simplify right side
    399,136.60x = 71,016,818,605.26
  5. Step 5: Solve for x
    x = 71,016,818,605.26/399,136.60
  6. Step 6: Final answer
    x = 177,926.10

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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.