Home / 1,215.16-1,822.72-349.40

Finding the Fourth Proportional to 1,215.16, 1,822.72 and 349.40

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Solution

The fourth proportional to 1,215.16, 1,822.72 and 349.40 is: 524.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.16 : 1,822.72 = 349.40 : x
  2. Step 2: Convert to fraction form
    1,215.16/1,822.72 = 349.40/x
  3. Step 3: Cross multiply
    1,215.16x = 1,822.72 × 349.40
  4. Step 4: Simplify right side
    1,215.16x = 636,858.37
  5. Step 5: Solve for x
    x = 636,858.37/1,215.16
  6. Step 6: Final answer
    x = 524.09

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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.