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Finding the Fourth Proportional to 393,781.60, 590,672.40 and 363,368.80

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Solution

The fourth proportional to 393,781.60, 590,672.40 and 363,368.80 is: 545,053.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,781.60 : 590,672.40 = 363,368.80 : x
  2. Step 2: Convert to fraction form
    393,781.60/590,672.40 = 363,368.80/x
  3. Step 3: Cross multiply
    393,781.60x = 590,672.40 × 363,368.80
  4. Step 4: Simplify right side
    393,781.60x = 214,631,921,181.12
  5. Step 5: Solve for x
    x = 214,631,921,181.12/393,781.60
  6. Step 6: Final answer
    x = 545,053.20

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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.