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Finding the Fourth Proportional to 1,276.66, 1,762.04 and 829.09

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Solution

The fourth proportional to 1,276.66, 1,762.04 and 829.09 is: 1,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.66 : 1,762.04 = 829.09 : x
  2. Step 2: Convert to fraction form
    1,276.66/1,762.04 = 829.09/x
  3. Step 3: Cross multiply
    1,276.66x = 1,762.04 × 829.09
  4. Step 4: Simplify right side
    1,276.66x = 1,460,881.19
  5. Step 5: Solve for x
    x = 1,460,881.19/1,276.66
  6. Step 6: Final answer
    x = 1,144.30

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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.