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Finding the Fourth Proportional to 1,260,328.04, 1,890,787.90 and 774,551.56

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Solution

The fourth proportional to 1,260,328.04, 1,890,787.90 and 774,551.56 is: 1,162,009.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,328.04 : 1,890,787.90 = 774,551.56 : x
  2. Step 2: Convert to fraction form
    1,260,328.04/1,890,787.90 = 774,551.56/x
  3. Step 3: Cross multiply
    1,260,328.04x = 1,890,787.90 × 774,551.56
  4. Step 4: Simplify right side
    1,260,328.04x = 1,464,512,717,574.12
  5. Step 5: Solve for x
    x = 1,464,512,717,574.12/1,260,328.04
  6. Step 6: Final answer
    x = 1,162,009.15

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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.