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Finding the Fourth Proportional to 1,262,787.84, 1,742,625.36 and 689,813.28

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Solution

The fourth proportional to 1,262,787.84, 1,742,625.36 and 689,813.28 is: 951,930.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262,787.84 : 1,742,625.36 = 689,813.28 : x
  2. Step 2: Convert to fraction form
    1,262,787.84/1,742,625.36 = 689,813.28/x
  3. Step 3: Cross multiply
    1,262,787.84x = 1,742,625.36 × 689,813.28
  4. Step 4: Simplify right side
    1,262,787.84x = 1,202,086,115,392.78
  5. Step 5: Solve for x
    x = 1,202,086,115,392.78/1,262,787.84
  6. Step 6: Final answer
    x = 951,930.39

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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.