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Finding the Fourth Proportional to 1,369,963.22, 1,890,502.70 and 758,141.78

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Solution

The fourth proportional to 1,369,963.22, 1,890,502.70 and 758,141.78 is: 1,046,209.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,963.22 : 1,890,502.70 = 758,141.78 : x
  2. Step 2: Convert to fraction form
    1,369,963.22/1,890,502.70 = 758,141.78/x
  3. Step 3: Cross multiply
    1,369,963.22x = 1,890,502.70 × 758,141.78
  4. Step 4: Simplify right side
    1,369,963.22x = 1,433,269,068,829.58
  5. Step 5: Solve for x
    x = 1,433,269,068,829.58/1,369,963.22
  6. Step 6: Final answer
    x = 1,046,209.89

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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.