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Finding the Fourth Proportional to 1,664.67, 2,497.61 and 787.44

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Solution

The fourth proportional to 1,664.67, 2,497.61 and 787.44 is: 1,181.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.67 : 2,497.61 = 787.44 : x
  2. Step 2: Convert to fraction form
    1,664.67/2,497.61 = 787.44/x
  3. Step 3: Cross multiply
    1,664.67x = 2,497.61 × 787.44
  4. Step 4: Simplify right side
    1,664.67x = 1,966,718.02
  5. Step 5: Solve for x
    x = 1,966,718.02/1,664.67
  6. Step 6: Final answer
    x = 1,181.45

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1.5x scale

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.