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Finding the Fourth Proportional to 258,814.40, 388,090.32 and 118,452.80

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Solution

The fourth proportional to 258,814.40, 388,090.32 and 118,452.80 is: 177,619.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,814.40 : 388,090.32 = 118,452.80 : x
  2. Step 2: Convert to fraction form
    258,814.40/388,090.32 = 118,452.80/x
  3. Step 3: Cross multiply
    258,814.40x = 388,090.32 × 118,452.80
  4. Step 4: Simplify right side
    258,814.40x = 45,970,385,056.90
  5. Step 5: Solve for x
    x = 45,970,385,056.90/258,814.40
  6. Step 6: Final answer
    x = 177,619.12

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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.