Home / 2,985.12-4,119.45-1,640.76

Finding the Fourth Proportional to 2,985.12, 4,119.45 and 1,640.76

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Solution

The fourth proportional to 2,985.12, 4,119.45 and 1,640.76 is: 2,264.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.12 : 4,119.45 = 1,640.76 : x
  2. Step 2: Convert to fraction form
    2,985.12/4,119.45 = 1,640.76/x
  3. Step 3: Cross multiply
    2,985.12x = 4,119.45 × 1,640.76
  4. Step 4: Simplify right side
    2,985.12x = 6,759,028.78
  5. Step 5: Solve for x
    x = 6,759,028.78/2,985.12
  6. Step 6: Final answer
    x = 2,264.24

Related Problems

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Half scale
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Double scale
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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.