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Finding the Fourth Proportional to 1,283.86, 1,769.70 and 910.03

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Solution

The fourth proportional to 1,283.86, 1,769.70 and 910.03 is: 1,254.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.86 : 1,769.70 = 910.03 : x
  2. Step 2: Convert to fraction form
    1,283.86/1,769.70 = 910.03/x
  3. Step 3: Cross multiply
    1,283.86x = 1,769.70 × 910.03
  4. Step 4: Simplify right side
    1,283.86x = 1,610,480.09
  5. Step 5: Solve for x
    x = 1,610,480.09/1,283.86
  6. Step 6: Final answer
    x = 1,254.40

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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.