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Finding the Fourth Proportional to 1,607.78, 2,405.30 and 1,012.74

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Solution

The fourth proportional to 1,607.78, 2,405.30 and 1,012.74 is: 1,515.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.78 : 2,405.30 = 1,012.74 : x
  2. Step 2: Convert to fraction form
    1,607.78/2,405.30 = 1,012.74/x
  3. Step 3: Cross multiply
    1,607.78x = 2,405.30 × 1,012.74
  4. Step 4: Simplify right side
    1,607.78x = 2,435,929.44
  5. Step 5: Solve for x
    x = 2,435,929.44/1,607.78
  6. Step 6: Final answer
    x = 1,515.09

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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.