Home / 2,127.18-3,190.77-666.45

Finding the Fourth Proportional to 2,127.18, 3,190.77 and 666.45

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Solution

The fourth proportional to 2,127.18, 3,190.77 and 666.45 is: 999.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.18 : 3,190.77 = 666.45 : x
  2. Step 2: Convert to fraction form
    2,127.18/3,190.77 = 666.45/x
  3. Step 3: Cross multiply
    2,127.18x = 3,190.77 × 666.45
  4. Step 4: Simplify right side
    2,127.18x = 2,126,475.45
  5. Step 5: Solve for x
    x = 2,126,475.45/2,127.18
  6. Step 6: Final answer
    x = 999.67

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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.