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Finding the Fourth Proportional to 1,074.58, 1,612.18 and 618.26

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Solution

The fourth proportional to 1,074.58, 1,612.18 and 618.26 is: 927.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.58 : 1,612.18 = 618.26 : x
  2. Step 2: Convert to fraction form
    1,074.58/1,612.18 = 618.26/x
  3. Step 3: Cross multiply
    1,074.58x = 1,612.18 × 618.26
  4. Step 4: Simplify right side
    1,074.58x = 996,746.41
  5. Step 5: Solve for x
    x = 996,746.41/1,074.58
  6. Step 6: Final answer
    x = 927.57

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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.