Home / 1,403.55-2,104.83-429.30

Finding the Fourth Proportional to 1,403.55, 2,104.83 and 429.30

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Solution

The fourth proportional to 1,403.55, 2,104.83 and 429.30 is: 643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.55 : 2,104.83 = 429.30 : x
  2. Step 2: Convert to fraction form
    1,403.55/2,104.83 = 429.30/x
  3. Step 3: Cross multiply
    1,403.55x = 2,104.83 × 429.30
  4. Step 4: Simplify right side
    1,403.55x = 903,603.52
  5. Step 5: Solve for x
    x = 903,603.52/1,403.55
  6. Step 6: Final answer
    x = 643.80

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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.