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Finding the Fourth Proportional to 239,663.20, 330,841.28 and 154,821.60

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Solution

The fourth proportional to 239,663.20, 330,841.28 and 154,821.60 is: 213,722.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,663.20 : 330,841.28 = 154,821.60 : x
  2. Step 2: Convert to fraction form
    239,663.20/330,841.28 = 154,821.60/x
  3. Step 3: Cross multiply
    239,663.20x = 330,841.28 × 154,821.60
  4. Step 4: Simplify right side
    239,663.20x = 51,221,376,315.65
  5. Step 5: Solve for x
    x = 51,221,376,315.65/239,663.20
  6. Step 6: Final answer
    x = 213,722.32

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1.5x scale

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.