Home / 1,121.02-1,547.73-722.85

Finding the Fourth Proportional to 1,121.02, 1,547.73 and 722.85

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Solution

The fourth proportional to 1,121.02, 1,547.73 and 722.85 is: 998.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.02 : 1,547.73 = 722.85 : x
  2. Step 2: Convert to fraction form
    1,121.02/1,547.73 = 722.85/x
  3. Step 3: Cross multiply
    1,121.02x = 1,547.73 × 722.85
  4. Step 4: Simplify right side
    1,121.02x = 1,118,777.21
  5. Step 5: Solve for x
    x = 1,118,777.21/1,121.02
  6. Step 6: Final answer
    x = 998.00

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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.