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Finding the Fourth Proportional to 1,258,792.71, 1,889,835.49 and 747,391.46

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Solution

The fourth proportional to 1,258,792.71, 1,889,835.49 and 747,391.46 is: 1,122,064.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258,792.71 : 1,889,835.49 = 747,391.46 : x
  2. Step 2: Convert to fraction form
    1,258,792.71/1,889,835.49 = 747,391.46/x
  3. Step 3: Cross multiply
    1,258,792.71x = 1,889,835.49 × 747,391.46
  4. Step 4: Simplify right side
    1,258,792.71x = 1,412,446,903,942.23
  5. Step 5: Solve for x
    x = 1,412,446,903,942.23/1,258,792.71
  6. Step 6: Final answer
    x = 1,122,064.73

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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.