Home / 1,820.48-2,731.12-666.20

Finding the Fourth Proportional to 1,820.48, 2,731.12 and 666.20

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Solution

The fourth proportional to 1,820.48, 2,731.12 and 666.20 is: 999.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.48 : 2,731.12 = 666.20 : x
  2. Step 2: Convert to fraction form
    1,820.48/2,731.12 = 666.20/x
  3. Step 3: Cross multiply
    1,820.48x = 2,731.12 × 666.20
  4. Step 4: Simplify right side
    1,820.48x = 1,819,472.14
  5. Step 5: Solve for x
    x = 1,819,472.14/1,820.48
  6. Step 6: Final answer
    x = 999.45

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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.