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Finding the Fourth Proportional to 419,393.10, 628,565.04 and 330,294.72

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Solution

The fourth proportional to 419,393.10, 628,565.04 and 330,294.72 is: 495,028.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,393.10 : 628,565.04 = 330,294.72 : x
  2. Step 2: Convert to fraction form
    419,393.10/628,565.04 = 330,294.72/x
  3. Step 3: Cross multiply
    419,393.10x = 628,565.04 × 330,294.72
  4. Step 4: Simplify right side
    419,393.10x = 207,611,713,888.59
  5. Step 5: Solve for x
    x = 207,611,713,888.59/419,393.10
  6. Step 6: Final answer
    x = 495,028.92

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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.