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Finding the Fourth Proportional to 245,894.20, 368,549.70 and 220,816.60

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Solution

The fourth proportional to 245,894.20, 368,549.70 and 220,816.60 is: 330,963.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,894.20 : 368,549.70 = 220,816.60 : x
  2. Step 2: Convert to fraction form
    245,894.20/368,549.70 = 220,816.60/x
  3. Step 3: Cross multiply
    245,894.20x = 368,549.70 × 220,816.60
  4. Step 4: Simplify right side
    245,894.20x = 81,381,891,685.02
  5. Step 5: Solve for x
    x = 81,381,891,685.02/245,894.20
  6. Step 6: Final answer
    x = 330,963.04

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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.