Home / 1,403.09-2,104.63-429.18

Finding the Fourth Proportional to 1,403.09, 2,104.63 and 429.18

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Solution

The fourth proportional to 1,403.09, 2,104.63 and 429.18 is: 643.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.09 : 2,104.63 = 429.18 : x
  2. Step 2: Convert to fraction form
    1,403.09/2,104.63 = 429.18/x
  3. Step 3: Cross multiply
    1,403.09x = 2,104.63 × 429.18
  4. Step 4: Simplify right side
    1,403.09x = 903,265.10
  5. Step 5: Solve for x
    x = 903,265.10/1,403.09
  6. Step 6: Final answer
    x = 643.77

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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.