Home / 1,607.78-2,411.64-1,285.20

Finding the Fourth Proportional to 1,607.78, 2,411.64 and 1,285.20

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Solution

The fourth proportional to 1,607.78, 2,411.64 and 1,285.20 is: 1,927.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.78 : 2,411.64 = 1,285.20 : x
  2. Step 2: Convert to fraction form
    1,607.78/2,411.64 = 1,285.20/x
  3. Step 3: Cross multiply
    1,607.78x = 2,411.64 × 1,285.20
  4. Step 4: Simplify right side
    1,607.78x = 3,099,439.73
  5. Step 5: Solve for x
    x = 3,099,439.73/1,607.78
  6. Step 6: Final answer
    x = 1,927.78

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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.