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Finding the Fourth Proportional to 299,505.51, 449,365.23 and 128,655.45

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Solution

The fourth proportional to 299,505.51, 449,365.23 and 128,655.45 is: 193,029.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,505.51 : 449,365.23 = 128,655.45 : x
  2. Step 2: Convert to fraction form
    299,505.51/449,365.23 = 128,655.45/x
  3. Step 3: Cross multiply
    299,505.51x = 449,365.23 × 128,655.45
  4. Step 4: Simplify right side
    299,505.51x = 57,813,285,880.00
  5. Step 5: Solve for x
    x = 57,813,285,880.00/299,505.51
  6. Step 6: Final answer
    x = 193,029.12

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1.5x scale

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.