Home / 1,220.14-1,829.96-429.61

Finding the Fourth Proportional to 1,220.14, 1,829.96 and 429.61

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Solution

The fourth proportional to 1,220.14, 1,829.96 and 429.61 is: 644.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.14 : 1,829.96 = 429.61 : x
  2. Step 2: Convert to fraction form
    1,220.14/1,829.96 = 429.61/x
  3. Step 3: Cross multiply
    1,220.14x = 1,829.96 × 429.61
  4. Step 4: Simplify right side
    1,220.14x = 786,157.82
  5. Step 5: Solve for x
    x = 786,157.82/1,220.14
  6. Step 6: Final answer
    x = 644.32

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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.