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Finding the Fourth Proportional to 238,317.78, 328,880.80 and 130,890

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Solution

The fourth proportional to 238,317.78, 328,880.80 and 130,890 is: 180,629.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,317.78 : 328,880.80 = 130,890 : x
  2. Step 2: Convert to fraction form
    238,317.78/328,880.80 = 130,890/x
  3. Step 3: Cross multiply
    238,317.78x = 328,880.80 × 130,890
  4. Step 4: Simplify right side
    238,317.78x = 43,047,207,912
  5. Step 5: Solve for x
    x = 43,047,207,912/238,317.78
  6. Step 6: Final answer
    x = 180,629.44

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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.