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Finding the Fourth Proportional to 449,091.32, 618,693.28 and 312,878.88

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Solution

The fourth proportional to 449,091.32, 618,693.28 and 312,878.88 is: 431,039.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,091.32 : 618,693.28 = 312,878.88 : x
  2. Step 2: Convert to fraction form
    449,091.32/618,693.28 = 312,878.88/x
  3. Step 3: Cross multiply
    449,091.32x = 618,693.28 × 312,878.88
  4. Step 4: Simplify right side
    449,091.32x = 193,576,060,509.93
  5. Step 5: Solve for x
    x = 193,576,060,509.93/449,091.32
  6. Step 6: Final answer
    x = 431,039.42

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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.