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Finding the Fourth Proportional to 245,895.20, 368,389.20 and 140,400.80

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Solution

The fourth proportional to 245,895.20, 368,389.20 and 140,400.80 is: 210,342.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,895.20 : 368,389.20 = 140,400.80 : x
  2. Step 2: Convert to fraction form
    245,895.20/368,389.20 = 140,400.80/x
  3. Step 3: Cross multiply
    245,895.20x = 368,389.20 × 140,400.80
  4. Step 4: Simplify right side
    245,895.20x = 51,722,138,391.36
  5. Step 5: Solve for x
    x = 51,722,138,391.36/245,895.20
  6. Step 6: Final answer
    x = 210,342.20

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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.