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Finding the Fourth Proportional to 1,292.36, 1,784.27 and 851.00

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Solution

The fourth proportional to 1,292.36, 1,784.27 and 851.00 is: 1,174.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.36 : 1,784.27 = 851.00 : x
  2. Step 2: Convert to fraction form
    1,292.36/1,784.27 = 851.00/x
  3. Step 3: Cross multiply
    1,292.36x = 1,784.27 × 851.00
  4. Step 4: Simplify right side
    1,292.36x = 1,518,400.59
  5. Step 5: Solve for x
    x = 1,518,400.59/1,292.36
  6. Step 6: Final answer
    x = 1,174.91

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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.