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Finding the Fourth Proportional to 1,277.04, 1,761.84 and 810.48

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Solution

The fourth proportional to 1,277.04, 1,761.84 and 810.48 is: 1,118.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.04 : 1,761.84 = 810.48 : x
  2. Step 2: Convert to fraction form
    1,277.04/1,761.84 = 810.48/x
  3. Step 3: Cross multiply
    1,277.04x = 1,761.84 × 810.48
  4. Step 4: Simplify right side
    1,277.04x = 1,427,936.08
  5. Step 5: Solve for x
    x = 1,427,936.08/1,277.04
  6. Step 6: Final answer
    x = 1,118.16

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1.5x scale

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.