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Finding the Fourth Proportional to 787.01, 1,179.74 and 293.30

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Solution

The fourth proportional to 787.01, 1,179.74 and 293.30 is: 439.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.01 : 1,179.74 = 293.30 : x
  2. Step 2: Convert to fraction form
    787.01/1,179.74 = 293.30/x
  3. Step 3: Cross multiply
    787.01x = 1,179.74 × 293.30
  4. Step 4: Simplify right side
    787.01x = 346,012.58
  5. Step 5: Solve for x
    x = 346,012.58/787.01
  6. Step 6: Final answer
    x = 439.66

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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.