Home / 1,580.12-2,179.58-1,137.32

Finding the Fourth Proportional to 1,580.12, 2,179.58 and 1,137.32

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Solution

The fourth proportional to 1,580.12, 2,179.58 and 1,137.32 is: 1,568.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.12 : 2,179.58 = 1,137.32 : x
  2. Step 2: Convert to fraction form
    1,580.12/2,179.58 = 1,137.32/x
  3. Step 3: Cross multiply
    1,580.12x = 2,179.58 × 1,137.32
  4. Step 4: Simplify right side
    1,580.12x = 2,478,879.93
  5. Step 5: Solve for x
    x = 2,478,879.93/1,580.12
  6. Step 6: Final answer
    x = 1,568.79

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.