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Finding the Fourth Proportional to 268,644.12, 370,687.74 and 155,445

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Solution

The fourth proportional to 268,644.12, 370,687.74 and 155,445 is: 214,490.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,644.12 : 370,687.74 = 155,445 : x
  2. Step 2: Convert to fraction form
    268,644.12/370,687.74 = 155,445/x
  3. Step 3: Cross multiply
    268,644.12x = 370,687.74 × 155,445
  4. Step 4: Simplify right side
    268,644.12x = 57,621,555,744.30
  5. Step 5: Solve for x
    x = 57,621,555,744.30/268,644.12
  6. Step 6: Final answer
    x = 214,490.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.