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Finding the Fourth Proportional to 3,393.93, 4,683.75 and 1,978.53

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Solution

The fourth proportional to 3,393.93, 4,683.75 and 1,978.53 is: 2,730.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,393.93 : 4,683.75 = 1,978.53 : x
  2. Step 2: Convert to fraction form
    3,393.93/4,683.75 = 1,978.53/x
  3. Step 3: Cross multiply
    3,393.93x = 4,683.75 × 1,978.53
  4. Step 4: Simplify right side
    3,393.93x = 9,266,920.47
  5. Step 5: Solve for x
    x = 9,266,920.47/3,393.93
  6. Step 6: Final answer
    x = 2,730.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.