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Finding the Fourth Proportional to 1,791,787.72, 2,472,667.26 and 986,971.72

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Solution

The fourth proportional to 1,791,787.72, 2,472,667.26 and 986,971.72 is: 1,362,021.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791,787.72 : 2,472,667.26 = 986,971.72 : x
  2. Step 2: Convert to fraction form
    1,791,787.72/2,472,667.26 = 986,971.72/x
  3. Step 3: Cross multiply
    1,791,787.72x = 2,472,667.26 × 986,971.72
  4. Step 4: Simplify right side
    1,791,787.72x = 2,440,452,658,589.89
  5. Step 5: Solve for x
    x = 2,440,452,658,589.89/1,791,787.72
  6. Step 6: Final answer
    x = 1,362,021.09

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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.