Home / 1,320.22-1,980.18-627.34

Finding the Fourth Proportional to 1,320.22, 1,980.18 and 627.34

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Solution

The fourth proportional to 1,320.22, 1,980.18 and 627.34 is: 940.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.22 : 1,980.18 = 627.34 : x
  2. Step 2: Convert to fraction form
    1,320.22/1,980.18 = 627.34/x
  3. Step 3: Cross multiply
    1,320.22x = 1,980.18 × 627.34
  4. Step 4: Simplify right side
    1,320.22x = 1,242,246.12
  5. Step 5: Solve for x
    x = 1,242,246.12/1,320.22
  6. Step 6: Final answer
    x = 940.94

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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.