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Finding the Fourth Proportional to 4,505.80, 6,758.70 and 3,120.70

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Solution

The fourth proportional to 4,505.80, 6,758.70 and 3,120.70 is: 4,681.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,505.80 : 6,758.70 = 3,120.70 : x
  2. Step 2: Convert to fraction form
    4,505.80/6,758.70 = 3,120.70/x
  3. Step 3: Cross multiply
    4,505.80x = 6,758.70 × 3,120.70
  4. Step 4: Simplify right side
    4,505.80x = 21,091,875.09
  5. Step 5: Solve for x
    x = 21,091,875.09/4,505.80
  6. Step 6: Final answer
    x = 4,681.05

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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.