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Finding the Fourth Proportional to 386,181.60, 579,272.40 and 136,888.80

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Solution

The fourth proportional to 386,181.60, 579,272.40 and 136,888.80 is: 205,333.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,181.60 : 579,272.40 = 136,888.80 : x
  2. Step 2: Convert to fraction form
    386,181.60/579,272.40 = 136,888.80/x
  3. Step 3: Cross multiply
    386,181.60x = 579,272.40 × 136,888.80
  4. Step 4: Simplify right side
    386,181.60x = 79,295,903,709.12
  5. Step 5: Solve for x
    x = 79,295,903,709.12/386,181.60
  6. Step 6: Final answer
    x = 205,333.20

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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.