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Finding the Fourth Proportional to 1,488.43, 2,054.01 and 858.95

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Solution

The fourth proportional to 1,488.43, 2,054.01 and 858.95 is: 1,185.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.43 : 2,054.01 = 858.95 : x
  2. Step 2: Convert to fraction form
    1,488.43/2,054.01 = 858.95/x
  3. Step 3: Cross multiply
    1,488.43x = 2,054.01 × 858.95
  4. Step 4: Simplify right side
    1,488.43x = 1,764,283.44
  5. Step 5: Solve for x
    x = 1,764,283.44/1,488.43
  6. Step 6: Final answer
    x = 1,185.34

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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.