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Finding the Fourth Proportional to 5,672.58, 7,830.28 and 3,315.48

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Solution

The fourth proportional to 5,672.58, 7,830.28 and 3,315.48 is: 4,576.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,672.58 : 7,830.28 = 3,315.48 : x
  2. Step 2: Convert to fraction form
    5,672.58/7,830.28 = 3,315.48/x
  3. Step 3: Cross multiply
    5,672.58x = 7,830.28 × 3,315.48
  4. Step 4: Simplify right side
    5,672.58x = 25,961,136.73
  5. Step 5: Solve for x
    x = 25,961,136.73/5,672.58
  6. Step 6: Final answer
    x = 4,576.60

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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.