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Finding the Fourth Proportional to 2,075.80, 3,113.70 and 615.10

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Solution

The fourth proportional to 2,075.80, 3,113.70 and 615.10 is: 922.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,075.80 : 3,113.70 = 615.10 : x
  2. Step 2: Convert to fraction form
    2,075.80/3,113.70 = 615.10/x
  3. Step 3: Cross multiply
    2,075.80x = 3,113.70 × 615.10
  4. Step 4: Simplify right side
    2,075.80x = 1,915,236.87
  5. Step 5: Solve for x
    x = 1,915,236.87/2,075.80
  6. Step 6: Final answer
    x = 922.65

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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.