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Finding the Fourth Proportional to 281,490.66, 388,449.51 and 160,629.78

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Solution

The fourth proportional to 281,490.66, 388,449.51 and 160,629.78 is: 221,664.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,490.66 : 388,449.51 = 160,629.78 : x
  2. Step 2: Convert to fraction form
    281,490.66/388,449.51 = 160,629.78/x
  3. Step 3: Cross multiply
    281,490.66x = 388,449.51 × 160,629.78
  4. Step 4: Simplify right side
    281,490.66x = 62,396,559,332.41
  5. Step 5: Solve for x
    x = 62,396,559,332.41/281,490.66
  6. Step 6: Final answer
    x = 221,664.76

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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.