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Finding the Fourth Proportional to 1,430.92, 2,146.38 and 553.06

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Solution

The fourth proportional to 1,430.92, 2,146.38 and 553.06 is: 829.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.92 : 2,146.38 = 553.06 : x
  2. Step 2: Convert to fraction form
    1,430.92/2,146.38 = 553.06/x
  3. Step 3: Cross multiply
    1,430.92x = 2,146.38 × 553.06
  4. Step 4: Simplify right side
    1,430.92x = 1,187,076.92
  5. Step 5: Solve for x
    x = 1,187,076.92/1,430.92
  6. Step 6: Final answer
    x = 829.59

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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.