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Finding the Fourth Proportional to 1,907.06, 2,860.30 and 657.85

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Solution

The fourth proportional to 1,907.06, 2,860.30 and 657.85 is: 986.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.06 : 2,860.30 = 657.85 : x
  2. Step 2: Convert to fraction form
    1,907.06/2,860.30 = 657.85/x
  3. Step 3: Cross multiply
    1,907.06x = 2,860.30 × 657.85
  4. Step 4: Simplify right side
    1,907.06x = 1,881,648.36
  5. Step 5: Solve for x
    x = 1,881,648.36/1,907.06
  6. Step 6: Final answer
    x = 986.67

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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.