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Finding the Fourth Proportional to 215,628.20, 322,664.70 and 145,644.20

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Solution

The fourth proportional to 215,628.20, 322,664.70 and 145,644.20 is: 217,941.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,628.20 : 322,664.70 = 145,644.20 : x
  2. Step 2: Convert to fraction form
    215,628.20/322,664.70 = 145,644.20/x
  3. Step 3: Cross multiply
    215,628.20x = 322,664.70 × 145,644.20
  4. Step 4: Simplify right side
    215,628.20x = 46,994,242,099.74
  5. Step 5: Solve for x
    x = 46,994,242,099.74/215,628.20
  6. Step 6: Final answer
    x = 217,941.08

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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.