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Finding the Fourth Proportional to 1,335.15, 2,000.32 and 787.03

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Solution

The fourth proportional to 1,335.15, 2,000.32 and 787.03 is: 1,179.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.15 : 2,000.32 = 787.03 : x
  2. Step 2: Convert to fraction form
    1,335.15/2,000.32 = 787.03/x
  3. Step 3: Cross multiply
    1,335.15x = 2,000.32 × 787.03
  4. Step 4: Simplify right side
    1,335.15x = 1,574,311.85
  5. Step 5: Solve for x
    x = 1,574,311.85/1,335.15
  6. Step 6: Final answer
    x = 1,179.13

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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.