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Finding the Fourth Proportional to 245,383.20, 368,290.80 and 145,418.40

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Solution

The fourth proportional to 245,383.20, 368,290.80 and 145,418.40 is: 218,255.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,383.20 : 368,290.80 = 145,418.40 : x
  2. Step 2: Convert to fraction form
    245,383.20/368,290.80 = 145,418.40/x
  3. Step 3: Cross multiply
    245,383.20x = 368,290.80 × 145,418.40
  4. Step 4: Simplify right side
    245,383.20x = 53,556,258,870.72
  5. Step 5: Solve for x
    x = 53,556,258,870.72/245,383.20
  6. Step 6: Final answer
    x = 218,255.61

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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.