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Finding the Fourth Proportional to 1,369,672.92, 1,890,123.68 and 757,825.64

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Solution

The fourth proportional to 1,369,672.92, 1,890,123.68 and 757,825.64 is: 1,045,785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,672.92 : 1,890,123.68 = 757,825.64 : x
  2. Step 2: Convert to fraction form
    1,369,672.92/1,890,123.68 = 757,825.64/x
  3. Step 3: Cross multiply
    1,369,672.92x = 1,890,123.68 × 757,825.64
  4. Step 4: Simplify right side
    1,369,672.92x = 1,432,384,187,475.16
  5. Step 5: Solve for x
    x = 1,432,384,187,475.16/1,369,672.92
  6. Step 6: Final answer
    x = 1,045,785.58

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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.