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Finding the Fourth Proportional to 1,430.31, 2,144.91 and 608.97

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Solution

The fourth proportional to 1,430.31, 2,144.91 and 608.97 is: 913.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.31 : 2,144.91 = 608.97 : x
  2. Step 2: Convert to fraction form
    1,430.31/2,144.91 = 608.97/x
  3. Step 3: Cross multiply
    1,430.31x = 2,144.91 × 608.97
  4. Step 4: Simplify right side
    1,430.31x = 1,306,185.84
  5. Step 5: Solve for x
    x = 1,306,185.84/1,430.31
  6. Step 6: Final answer
    x = 913.22

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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.