Home / 1,214.38-1,821.54-434.17

Finding the Fourth Proportional to 1,214.38, 1,821.54 and 434.17

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Solution

The fourth proportional to 1,214.38, 1,821.54 and 434.17 is: 651.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.38 : 1,821.54 = 434.17 : x
  2. Step 2: Convert to fraction form
    1,214.38/1,821.54 = 434.17/x
  3. Step 3: Cross multiply
    1,214.38x = 1,821.54 × 434.17
  4. Step 4: Simplify right side
    1,214.38x = 790,858.02
  5. Step 5: Solve for x
    x = 790,858.02/1,214.38
  6. Step 6: Final answer
    x = 651.24

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1.5x scale

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.