Home / 1,214.73-1,821.90-435.30

Finding the Fourth Proportional to 1,214.73, 1,821.90 and 435.30

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Solution

The fourth proportional to 1,214.73, 1,821.90 and 435.30 is: 652.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.73 : 1,821.90 = 435.30 : x
  2. Step 2: Convert to fraction form
    1,214.73/1,821.90 = 435.30/x
  3. Step 3: Cross multiply
    1,214.73x = 1,821.90 × 435.30
  4. Step 4: Simplify right side
    1,214.73x = 793,073.07
  5. Step 5: Solve for x
    x = 793,073.07/1,214.73
  6. Step 6: Final answer
    x = 652.88

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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.