Home / 1,116.63-1,666.75-985.26

Finding the Fourth Proportional to 1,116.63, 1,666.75 and 985.26

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Solution

The fourth proportional to 1,116.63, 1,666.75 and 985.26 is: 1,470.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.63 : 1,666.75 = 985.26 : x
  2. Step 2: Convert to fraction form
    1,116.63/1,666.75 = 985.26/x
  3. Step 3: Cross multiply
    1,116.63x = 1,666.75 × 985.26
  4. Step 4: Simplify right side
    1,116.63x = 1,642,179.64
  5. Step 5: Solve for x
    x = 1,642,179.64/1,116.63
  6. Step 6: Final answer
    x = 1,470.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.