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Finding the Fourth Proportional to 299,506.51, 449,366.73 and 128,656.45

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Solution

The fourth proportional to 299,506.51, 449,366.73 and 128,656.45 is: 193,030.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,506.51 : 449,366.73 = 128,656.45 : x
  2. Step 2: Convert to fraction form
    299,506.51/449,366.73 = 128,656.45/x
  3. Step 3: Cross multiply
    299,506.51x = 449,366.73 × 128,656.45
  4. Step 4: Simplify right side
    299,506.51x = 57,813,928,229.91
  5. Step 5: Solve for x
    x = 57,813,928,229.91/299,506.51
  6. Step 6: Final answer
    x = 193,030.62

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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.