Home / 1,685.02-2,325.36-986.80

Finding the Fourth Proportional to 1,685.02, 2,325.36 and 986.80

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Solution

The fourth proportional to 1,685.02, 2,325.36 and 986.80 is: 1,361.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.02 : 2,325.36 = 986.80 : x
  2. Step 2: Convert to fraction form
    1,685.02/2,325.36 = 986.80/x
  3. Step 3: Cross multiply
    1,685.02x = 2,325.36 × 986.80
  4. Step 4: Simplify right side
    1,685.02x = 2,294,665.25
  5. Step 5: Solve for x
    x = 2,294,665.25/1,685.02
  6. Step 6: Final answer
    x = 1,361.80

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1.5x scale

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.