Home / 1,030.77-1,422.58-998.47

Finding the Fourth Proportional to 1,030.77, 1,422.58 and 998.47

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Solution

The fourth proportional to 1,030.77, 1,422.58 and 998.47 is: 1,378.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.77 : 1,422.58 = 998.47 : x
  2. Step 2: Convert to fraction form
    1,030.77/1,422.58 = 998.47/x
  3. Step 3: Cross multiply
    1,030.77x = 1,422.58 × 998.47
  4. Step 4: Simplify right side
    1,030.77x = 1,420,403.45
  5. Step 5: Solve for x
    x = 1,420,403.45/1,030.77
  6. Step 6: Final answer
    x = 1,378.00

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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.