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Finding the Fourth Proportional to 1,263.28, 1,743.31 and 703.74

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Solution

The fourth proportional to 1,263.28, 1,743.31 and 703.74 is: 971.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.28 : 1,743.31 = 703.74 : x
  2. Step 2: Convert to fraction form
    1,263.28/1,743.31 = 703.74/x
  3. Step 3: Cross multiply
    1,263.28x = 1,743.31 × 703.74
  4. Step 4: Simplify right side
    1,263.28x = 1,226,830.63
  5. Step 5: Solve for x
    x = 1,226,830.63/1,263.28
  6. Step 6: Final answer
    x = 971.15

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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.