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Finding the Fourth Proportional to 1,384.09, 2,075.91 and 459.61

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Solution

The fourth proportional to 1,384.09, 2,075.91 and 459.61 is: 689.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.09 : 2,075.91 = 459.61 : x
  2. Step 2: Convert to fraction form
    1,384.09/2,075.91 = 459.61/x
  3. Step 3: Cross multiply
    1,384.09x = 2,075.91 × 459.61
  4. Step 4: Simplify right side
    1,384.09x = 954,109.00
  5. Step 5: Solve for x
    x = 954,109.00/1,384.09
  6. Step 6: Final answer
    x = 689.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.