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Finding the Fourth Proportional to 1,074.15, 1,611.56 and 457.53

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Solution

The fourth proportional to 1,074.15, 1,611.56 and 457.53 is: 686.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.15 : 1,611.56 = 457.53 : x
  2. Step 2: Convert to fraction form
    1,074.15/1,611.56 = 457.53/x
  3. Step 3: Cross multiply
    1,074.15x = 1,611.56 × 457.53
  4. Step 4: Simplify right side
    1,074.15x = 737,334.76
  5. Step 5: Solve for x
    x = 737,334.76/1,074.15
  6. Step 6: Final answer
    x = 686.44

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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.