Home / 1,218.90-1,828.35-353.10

Finding the Fourth Proportional to 1,218.90, 1,828.35 and 353.10

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Solution

The fourth proportional to 1,218.90, 1,828.35 and 353.10 is: 529.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.90 : 1,828.35 = 353.10 : x
  2. Step 2: Convert to fraction form
    1,218.90/1,828.35 = 353.10/x
  3. Step 3: Cross multiply
    1,218.90x = 1,828.35 × 353.10
  4. Step 4: Simplify right side
    1,218.90x = 645,590.39
  5. Step 5: Solve for x
    x = 645,590.39/1,218.90
  6. Step 6: Final answer
    x = 529.65

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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.