Home / 1,039.15-1,433.64-666.28

Finding the Fourth Proportional to 1,039.15, 1,433.64 and 666.28

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Solution

The fourth proportional to 1,039.15, 1,433.64 and 666.28 is: 919.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.15 : 1,433.64 = 666.28 : x
  2. Step 2: Convert to fraction form
    1,039.15/1,433.64 = 666.28/x
  3. Step 3: Cross multiply
    1,039.15x = 1,433.64 × 666.28
  4. Step 4: Simplify right side
    1,039.15x = 955,205.66
  5. Step 5: Solve for x
    x = 955,205.66/1,039.15
  6. Step 6: Final answer
    x = 919.22

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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.