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Finding the Fourth Proportional to 1,295.99, 1,787.97 and 830.51

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Solution

The fourth proportional to 1,295.99, 1,787.97 and 830.51 is: 1,145.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.99 : 1,787.97 = 830.51 : x
  2. Step 2: Convert to fraction form
    1,295.99/1,787.97 = 830.51/x
  3. Step 3: Cross multiply
    1,295.99x = 1,787.97 × 830.51
  4. Step 4: Simplify right side
    1,295.99x = 1,484,918.02
  5. Step 5: Solve for x
    x = 1,484,918.02/1,295.99
  6. Step 6: Final answer
    x = 1,145.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.