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Finding the Fourth Proportional to 1,075.92, 1,485.02 and 633.97

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Solution

The fourth proportional to 1,075.92, 1,485.02 and 633.97 is: 875.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.92 : 1,485.02 = 633.97 : x
  2. Step 2: Convert to fraction form
    1,075.92/1,485.02 = 633.97/x
  3. Step 3: Cross multiply
    1,075.92x = 1,485.02 × 633.97
  4. Step 4: Simplify right side
    1,075.92x = 941,449.65
  5. Step 5: Solve for x
    x = 941,449.65/1,075.92
  6. Step 6: Final answer
    x = 875.02

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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.