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Finding the Fourth Proportional to 1,432,323.81, 1,976,606.15 and 787,787.37

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Solution

The fourth proportional to 1,432,323.81, 1,976,606.15 and 787,787.37 is: 1,087,146.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432,323.81 : 1,976,606.15 = 787,787.37 : x
  2. Step 2: Convert to fraction form
    1,432,323.81/1,976,606.15 = 787,787.37/x
  3. Step 3: Cross multiply
    1,432,323.81x = 1,976,606.15 × 787,787.37
  4. Step 4: Simplify right side
    1,432,323.81x = 1,557,145,356,495.39
  5. Step 5: Solve for x
    x = 1,557,145,356,495.39/1,432,323.81
  6. Step 6: Final answer
    x = 1,087,146.18

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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.