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Finding the Fourth Proportional to 1,904.94, 2,856.74 and 864.07

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Solution

The fourth proportional to 1,904.94, 2,856.74 and 864.07 is: 1,295.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.94 : 2,856.74 = 864.07 : x
  2. Step 2: Convert to fraction form
    1,904.94/2,856.74 = 864.07/x
  3. Step 3: Cross multiply
    1,904.94x = 2,856.74 × 864.07
  4. Step 4: Simplify right side
    1,904.94x = 2,468,411.87
  5. Step 5: Solve for x
    x = 2,468,411.87/1,904.94
  6. Step 6: Final answer
    x = 1,295.80

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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.