Home / 1,638.36-2,263.23-1,140.75

Finding the Fourth Proportional to 1,638.36, 2,263.23 and 1,140.75

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Solution

The fourth proportional to 1,638.36, 2,263.23 and 1,140.75 is: 1,575.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.36 : 2,263.23 = 1,140.75 : x
  2. Step 2: Convert to fraction form
    1,638.36/2,263.23 = 1,140.75/x
  3. Step 3: Cross multiply
    1,638.36x = 2,263.23 × 1,140.75
  4. Step 4: Simplify right side
    1,638.36x = 2,581,779.62
  5. Step 5: Solve for x
    x = 2,581,779.62/1,638.36
  6. Step 6: Final answer
    x = 1,575.83

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Half scale
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Double scale
Find fourth proportional to 1,639.36, 2,264.61 and 1,141.75
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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.