Home / 1,620.24-2,428.46-646.62

Finding the Fourth Proportional to 1,620.24, 2,428.46 and 646.62

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Solution

The fourth proportional to 1,620.24, 2,428.46 and 646.62 is: 969.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.24 : 2,428.46 = 646.62 : x
  2. Step 2: Convert to fraction form
    1,620.24/2,428.46 = 646.62/x
  3. Step 3: Cross multiply
    1,620.24x = 2,428.46 × 646.62
  4. Step 4: Simplify right side
    1,620.24x = 1,570,290.81
  5. Step 5: Solve for x
    x = 1,570,290.81/1,620.24
  6. Step 6: Final answer
    x = 969.17

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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.