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Finding the Fourth Proportional to 1,800.76, 2,485.56 and 1,276.96

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Solution

The fourth proportional to 1,800.76, 2,485.56 and 1,276.96 is: 1,762.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,800.76 : 2,485.56 = 1,276.96 : x
  2. Step 2: Convert to fraction form
    1,800.76/2,485.56 = 1,276.96/x
  3. Step 3: Cross multiply
    1,800.76x = 2,485.56 × 1,276.96
  4. Step 4: Simplify right side
    1,800.76x = 3,173,960.70
  5. Step 5: Solve for x
    x = 3,173,960.70/1,800.76
  6. Step 6: Final answer
    x = 1,762.57

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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.