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Finding the Fourth Proportional to 5,890.80, 8,857.80 and 4,940.40

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Solution

The fourth proportional to 5,890.80, 8,857.80 and 4,940.40 is: 7,428.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,890.80 : 8,857.80 = 4,940.40 : x
  2. Step 2: Convert to fraction form
    5,890.80/8,857.80 = 4,940.40/x
  3. Step 3: Cross multiply
    5,890.80x = 8,857.80 × 4,940.40
  4. Step 4: Simplify right side
    5,890.80x = 43,761,075.12
  5. Step 5: Solve for x
    x = 43,761,075.12/5,890.80
  6. Step 6: Final answer
    x = 7,428.72

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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.