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Finding the Fourth Proportional to 243,051.60, 365,268.60 and 212,638.80

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Solution

The fourth proportional to 243,051.60, 365,268.60 and 212,638.80 is: 319,562.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,051.60 : 365,268.60 = 212,638.80 : x
  2. Step 2: Convert to fraction form
    243,051.60/365,268.60 = 212,638.80/x
  3. Step 3: Cross multiply
    243,051.60x = 365,268.60 × 212,638.80
  4. Step 4: Simplify right side
    243,051.60x = 77,670,276,781.68
  5. Step 5: Solve for x
    x = 77,670,276,781.68/243,051.60
  6. Step 6: Final answer
    x = 319,562.91

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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.