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Finding the Fourth Proportional to 1,488.54, 2,054.16 and 859.03

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Solution

The fourth proportional to 1,488.54, 2,054.16 and 859.03 is: 1,185.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.54 : 2,054.16 = 859.03 : x
  2. Step 2: Convert to fraction form
    1,488.54/2,054.16 = 859.03/x
  3. Step 3: Cross multiply
    1,488.54x = 2,054.16 × 859.03
  4. Step 4: Simplify right side
    1,488.54x = 1,764,585.06
  5. Step 5: Solve for x
    x = 1,764,585.06/1,488.54
  6. Step 6: Final answer
    x = 1,185.45

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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.