Home / 1,380.32-1,907.34-986.66

Finding the Fourth Proportional to 1,380.32, 1,907.34 and 986.66

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Solution

The fourth proportional to 1,380.32, 1,907.34 and 986.66 is: 1,363.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.32 : 1,907.34 = 986.66 : x
  2. Step 2: Convert to fraction form
    1,380.32/1,907.34 = 986.66/x
  3. Step 3: Cross multiply
    1,380.32x = 1,907.34 × 986.66
  4. Step 4: Simplify right side
    1,380.32x = 1,881,896.08
  5. Step 5: Solve for x
    x = 1,881,896.08/1,380.32
  6. Step 6: Final answer
    x = 1,363.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.