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Finding the Fourth Proportional to 1,369,671.91, 1,890,122.30 and 757,824.64

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Solution

The fourth proportional to 1,369,671.91, 1,890,122.30 and 757,824.64 is: 1,045,784.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,671.91 : 1,890,122.30 = 757,824.64 : x
  2. Step 2: Convert to fraction form
    1,369,671.91/1,890,122.30 = 757,824.64/x
  3. Step 3: Cross multiply
    1,369,671.91x = 1,890,122.30 × 757,824.64
  4. Step 4: Simplify right side
    1,369,671.91x = 1,432,381,251,553.47
  5. Step 5: Solve for x
    x = 1,432,381,251,553.47/1,369,671.91
  6. Step 6: Final answer
    x = 1,045,784.21

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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.