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Finding the Fourth Proportional to 1,283.31, 1,771.10 and 723.92

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Solution

The fourth proportional to 1,283.31, 1,771.10 and 723.92 is: 999.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.31 : 1,771.10 = 723.92 : x
  2. Step 2: Convert to fraction form
    1,283.31/1,771.10 = 723.92/x
  3. Step 3: Cross multiply
    1,283.31x = 1,771.10 × 723.92
  4. Step 4: Simplify right side
    1,283.31x = 1,282,134.71
  5. Step 5: Solve for x
    x = 1,282,134.71/1,283.31
  6. Step 6: Final answer
    x = 999.08

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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.