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Finding the Fourth Proportional to 1,283.66, 1,771.10 and 724.10

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Solution

The fourth proportional to 1,283.66, 1,771.10 and 724.10 is: 999.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.66 : 1,771.10 = 724.10 : x
  2. Step 2: Convert to fraction form
    1,283.66/1,771.10 = 724.10/x
  3. Step 3: Cross multiply
    1,283.66x = 1,771.10 × 724.10
  4. Step 4: Simplify right side
    1,283.66x = 1,282,453.51
  5. Step 5: Solve for x
    x = 1,282,453.51/1,283.66
  6. Step 6: Final answer
    x = 999.06

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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.