Home / 1,430.30-2,141.96-1,291.79

Finding the Fourth Proportional to 1,430.30, 2,141.96 and 1,291.79

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Solution

The fourth proportional to 1,430.30, 2,141.96 and 1,291.79 is: 1,934.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.30 : 2,141.96 = 1,291.79 : x
  2. Step 2: Convert to fraction form
    1,430.30/2,141.96 = 1,291.79/x
  3. Step 3: Cross multiply
    1,430.30x = 2,141.96 × 1,291.79
  4. Step 4: Simplify right side
    1,430.30x = 2,766,961.40
  5. Step 5: Solve for x
    x = 2,766,961.40/1,430.30
  6. Step 6: Final answer
    x = 1,934.53

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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.