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Finding the Fourth Proportional to 1,046.64, 1,443.06 and 859.80

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Solution

The fourth proportional to 1,046.64, 1,443.06 and 859.80 is: 1,185.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,046.64 : 1,443.06 = 859.80 : x
  2. Step 2: Convert to fraction form
    1,046.64/1,443.06 = 859.80/x
  3. Step 3: Cross multiply
    1,046.64x = 1,443.06 × 859.80
  4. Step 4: Simplify right side
    1,046.64x = 1,240,742.99
  5. Step 5: Solve for x
    x = 1,240,742.99/1,046.64
  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.