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Finding the Fourth Proportional to 238,628.70, 357,943.05 and 105,440.40

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Solution

The fourth proportional to 238,628.70, 357,943.05 and 105,440.40 is: 158,160.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,628.70 : 357,943.05 = 105,440.40 : x
  2. Step 2: Convert to fraction form
    238,628.70/357,943.05 = 105,440.40/x
  3. Step 3: Cross multiply
    238,628.70x = 357,943.05 × 105,440.40
  4. Step 4: Simplify right side
    238,628.70x = 37,741,658,369.22
  5. Step 5: Solve for x
    x = 37,741,658,369.22/238,628.70
  6. Step 6: Final answer
    x = 158,160.60

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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.