Home / 1,584.32-2,185.85-921.38

Finding the Fourth Proportional to 1,584.32, 2,185.85 and 921.38

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Solution

The fourth proportional to 1,584.32, 2,185.85 and 921.38 is: 1,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,584.32 : 2,185.85 = 921.38 : x
  2. Step 2: Convert to fraction form
    1,584.32/2,185.85 = 921.38/x
  3. Step 3: Cross multiply
    1,584.32x = 2,185.85 × 921.38
  4. Step 4: Simplify right side
    1,584.32x = 2,013,993.87
  5. Step 5: Solve for x
    x = 2,013,993.87/1,584.32
  6. Step 6: Final answer
    x = 1,271.20

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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.