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Finding the Fourth Proportional to 1,474.76, 2,035.13 and 811.67

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Solution

The fourth proportional to 1,474.76, 2,035.13 and 811.67 is: 1,120.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.76 : 2,035.13 = 811.67 : x
  2. Step 2: Convert to fraction form
    1,474.76/2,035.13 = 811.67/x
  3. Step 3: Cross multiply
    1,474.76x = 2,035.13 × 811.67
  4. Step 4: Simplify right side
    1,474.76x = 1,651,839.73
  5. Step 5: Solve for x
    x = 1,651,839.73/1,474.76
  6. Step 6: Final answer
    x = 1,120.07

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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.