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Finding the Fourth Proportional to 3,312.99, 4,970.13 and 1,121.67

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Solution

The fourth proportional to 3,312.99, 4,970.13 and 1,121.67 is: 1,682.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.99 : 4,970.13 = 1,121.67 : x
  2. Step 2: Convert to fraction form
    3,312.99/4,970.13 = 1,121.67/x
  3. Step 3: Cross multiply
    3,312.99x = 4,970.13 × 1,121.67
  4. Step 4: Simplify right side
    3,312.99x = 5,574,845.72
  5. Step 5: Solve for x
    x = 5,574,845.72/3,312.99
  6. Step 6: Final answer
    x = 1,682.72

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1.5x scale

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.