Home / 1,685.25-2,325.60-939.15

Finding the Fourth Proportional to 1,685.25, 2,325.60 and 939.15

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Solution

The fourth proportional to 1,685.25, 2,325.60 and 939.15 is: 1,296.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.25 : 2,325.60 = 939.15 : x
  2. Step 2: Convert to fraction form
    1,685.25/2,325.60 = 939.15/x
  3. Step 3: Cross multiply
    1,685.25x = 2,325.60 × 939.15
  4. Step 4: Simplify right side
    1,685.25x = 2,184,087.24
  5. Step 5: Solve for x
    x = 2,184,087.24/1,685.25
  6. Step 6: Final answer
    x = 1,296.00

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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.