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Finding the Fourth Proportional to 1,074.61, 1,611.64 and 424.99

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Solution

The fourth proportional to 1,074.61, 1,611.64 and 424.99 is: 637.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.61 : 1,611.64 = 424.99 : x
  2. Step 2: Convert to fraction form
    1,074.61/1,611.64 = 424.99/x
  3. Step 3: Cross multiply
    1,074.61x = 1,611.64 × 424.99
  4. Step 4: Simplify right side
    1,074.61x = 684,930.88
  5. Step 5: Solve for x
    x = 684,930.88/1,074.61
  6. Step 6: Final answer
    x = 637.38

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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.