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Finding the Fourth Proportional to 2,127.67, 3,191.10 and 666.70

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Solution

The fourth proportional to 2,127.67, 3,191.10 and 666.70 is: 999.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.67 : 3,191.10 = 666.70 : x
  2. Step 2: Convert to fraction form
    2,127.67/3,191.10 = 666.70/x
  3. Step 3: Cross multiply
    2,127.67x = 3,191.10 × 666.70
  4. Step 4: Simplify right side
    2,127.67x = 2,127,506.37
  5. Step 5: Solve for x
    x = 2,127,506.37/2,127.67
  6. Step 6: Final answer
    x = 999.92

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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.