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Finding the Fourth Proportional to 1,907.07, 2,859.89 and 657.31

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Solution

The fourth proportional to 1,907.07, 2,859.89 and 657.31 is: 985.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.07 : 2,859.89 = 657.31 : x
  2. Step 2: Convert to fraction form
    1,907.07/2,859.89 = 657.31/x
  3. Step 3: Cross multiply
    1,907.07x = 2,859.89 × 657.31
  4. Step 4: Simplify right side
    1,907.07x = 1,879,834.30
  5. Step 5: Solve for x
    x = 1,879,834.30/1,907.07
  6. Step 6: Final answer
    x = 985.72

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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.