Home / 1,581.70-2,181.78-1,140.19

Finding the Fourth Proportional to 1,581.70, 2,181.78 and 1,140.19

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Solution

The fourth proportional to 1,581.70, 2,181.78 and 1,140.19 is: 1,572.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.70 : 2,181.78 = 1,140.19 : x
  2. Step 2: Convert to fraction form
    1,581.70/2,181.78 = 1,140.19/x
  3. Step 3: Cross multiply
    1,581.70x = 2,181.78 × 1,140.19
  4. Step 4: Simplify right side
    1,581.70x = 2,487,643.74
  5. Step 5: Solve for x
    x = 2,487,643.74/1,581.70
  6. Step 6: Final answer
    x = 1,572.77

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,582.70, 2,183.16 and 1,141.19
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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.