Home / 5,220.57-7,830.86-1,271.82

Finding the Fourth Proportional to 5,220.57, 7,830.86 and 1,271.82

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Solution

The fourth proportional to 5,220.57, 7,830.86 and 1,271.82 is: 1,907.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.57 : 7,830.86 = 1,271.82 : x
  2. Step 2: Convert to fraction form
    5,220.57/7,830.86 = 1,271.82/x
  3. Step 3: Cross multiply
    5,220.57x = 7,830.86 × 1,271.82
  4. Step 4: Simplify right side
    5,220.57x = 9,959,444.37
  5. Step 5: Solve for x
    x = 9,959,444.37/5,220.57
  6. Step 6: Final answer
    x = 1,907.73

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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.