Home / 1,121.18-1,544.02-1,117.53

Finding the Fourth Proportional to 1,121.18, 1,544.02 and 1,117.53

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Solution

The fourth proportional to 1,121.18, 1,544.02 and 1,117.53 is: 1,538.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.18 : 1,544.02 = 1,117.53 : x
  2. Step 2: Convert to fraction form
    1,121.18/1,544.02 = 1,117.53/x
  3. Step 3: Cross multiply
    1,121.18x = 1,544.02 × 1,117.53
  4. Step 4: Simplify right side
    1,121.18x = 1,725,483.08
  5. Step 5: Solve for x
    x = 1,725,483.08/1,121.18
  6. Step 6: Final answer
    x = 1,538.99

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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.