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Finding the Fourth Proportional to 2,127.83, 3,191.74 and 666.99

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Solution

The fourth proportional to 2,127.83, 3,191.74 and 666.99 is: 1,000.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.83 : 3,191.74 = 666.99 : x
  2. Step 2: Convert to fraction form
    2,127.83/3,191.74 = 666.99/x
  3. Step 3: Cross multiply
    2,127.83x = 3,191.74 × 666.99
  4. Step 4: Simplify right side
    2,127.83x = 2,128,857.00
  5. Step 5: Solve for x
    x = 2,128,857.00/2,127.83
  6. Step 6: Final answer
    x = 1,000.49

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.