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Finding the Fourth Proportional to 1,263.42, 1,743.56 and 703.93

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Solution

The fourth proportional to 1,263.42, 1,743.56 and 703.93 is: 971.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.42 : 1,743.56 = 703.93 : x
  2. Step 2: Convert to fraction form
    1,263.42/1,743.56 = 703.93/x
  3. Step 3: Cross multiply
    1,263.42x = 1,743.56 × 703.93
  4. Step 4: Simplify right side
    1,263.42x = 1,227,344.19
  5. Step 5: Solve for x
    x = 1,227,344.19/1,263.42
  6. Step 6: Final answer
    x = 971.45

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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.