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Finding the Fourth Proportional to 1,655.86, 2,483.78 and 787.54

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Solution

The fourth proportional to 1,655.86, 2,483.78 and 787.54 is: 1,181.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,655.86 : 2,483.78 = 787.54 : x
  2. Step 2: Convert to fraction form
    1,655.86/2,483.78 = 787.54/x
  3. Step 3: Cross multiply
    1,655.86x = 2,483.78 × 787.54
  4. Step 4: Simplify right side
    1,655.86x = 1,956,076.10
  5. Step 5: Solve for x
    x = 1,956,076.10/1,655.86
  6. Step 6: Final answer
    x = 1,181.31

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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.