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Finding the Fourth Proportional to 5,307.74, 7,321.50 and 3,418.70

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Solution

The fourth proportional to 5,307.74, 7,321.50 and 3,418.70 is: 4,715.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,307.74 : 7,321.50 = 3,418.70 : x
  2. Step 2: Convert to fraction form
    5,307.74/7,321.50 = 3,418.70/x
  3. Step 3: Cross multiply
    5,307.74x = 7,321.50 × 3,418.70
  4. Step 4: Simplify right side
    5,307.74x = 25,030,012.05
  5. Step 5: Solve for x
    x = 25,030,012.05/5,307.74
  6. Step 6: Final answer
    x = 4,715.76

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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.