Home / 1,431.02-1,975.68-1,098.80

Finding the Fourth Proportional to 1,431.02, 1,975.68 and 1,098.80

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Solution

The fourth proportional to 1,431.02, 1,975.68 and 1,098.80 is: 1,517.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.02 : 1,975.68 = 1,098.80 : x
  2. Step 2: Convert to fraction form
    1,431.02/1,975.68 = 1,098.80/x
  3. Step 3: Cross multiply
    1,431.02x = 1,975.68 × 1,098.80
  4. Step 4: Simplify right side
    1,431.02x = 2,170,877.18
  5. Step 5: Solve for x
    x = 2,170,877.18/1,431.02
  6. Step 6: Final answer
    x = 1,517.01

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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.