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Finding the Fourth Proportional to 1,034.84, 1,430.82 and 905.24

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Solution

The fourth proportional to 1,034.84, 1,430.82 and 905.24 is: 1,251.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.84 : 1,430.82 = 905.24 : x
  2. Step 2: Convert to fraction form
    1,034.84/1,430.82 = 905.24/x
  3. Step 3: Cross multiply
    1,034.84x = 1,430.82 × 905.24
  4. Step 4: Simplify right side
    1,034.84x = 1,295,235.50
  5. Step 5: Solve for x
    x = 1,295,235.50/1,034.84
  6. Step 6: Final answer
    x = 1,251.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.