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Finding the Fourth Proportional to 983.37, 1,475.07 and 787.46

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Solution

The fourth proportional to 983.37, 1,475.07 and 787.46 is: 1,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.37 : 1,475.07 = 787.46 : x
  2. Step 2: Convert to fraction form
    983.37/1,475.07 = 787.46/x
  3. Step 3: Cross multiply
    983.37x = 1,475.07 × 787.46
  4. Step 4: Simplify right side
    983.37x = 1,161,558.62
  5. Step 5: Solve for x
    x = 1,161,558.62/983.37
  6. Step 6: Final answer
    x = 1,181.20

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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.