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Finding the Fourth Proportional to 1,479.89, 2,219.38 and 614

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Solution

The fourth proportional to 1,479.89, 2,219.38 and 614 is: 920.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.89 : 2,219.38 = 614 : x
  2. Step 2: Convert to fraction form
    1,479.89/2,219.38 = 614/x
  3. Step 3: Cross multiply
    1,479.89x = 2,219.38 × 614
  4. Step 4: Simplify right side
    1,479.89x = 1,362,699.32
  5. Step 5: Solve for x
    x = 1,362,699.32/1,479.89
  6. Step 6: Final answer
    x = 920.81

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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.