Home / 1,021.73-1,531.52-429.08

Finding the Fourth Proportional to 1,021.73, 1,531.52 and 429.08

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Solution

The fourth proportional to 1,021.73, 1,531.52 and 429.08 is: 643.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.73 : 1,531.52 = 429.08 : x
  2. Step 2: Convert to fraction form
    1,021.73/1,531.52 = 429.08/x
  3. Step 3: Cross multiply
    1,021.73x = 1,531.52 × 429.08
  4. Step 4: Simplify right side
    1,021.73x = 657,134.80
  5. Step 5: Solve for x
    x = 657,134.80/1,021.73
  6. Step 6: Final answer
    x = 643.16

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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.