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Finding the Fourth Proportional to 1,435.88, 2,152.90 and 787.08

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Solution

The fourth proportional to 1,435.88, 2,152.90 and 787.08 is: 1,180.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.88 : 2,152.90 = 787.08 : x
  2. Step 2: Convert to fraction form
    1,435.88/2,152.90 = 787.08/x
  3. Step 3: Cross multiply
    1,435.88x = 2,152.90 × 787.08
  4. Step 4: Simplify right side
    1,435.88x = 1,694,504.53
  5. Step 5: Solve for x
    x = 1,694,504.53/1,435.88
  6. Step 6: Final answer
    x = 1,180.12

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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.