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Finding the Fourth Proportional to 1,296.07, 1,788.62 and 706.64

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Solution

The fourth proportional to 1,296.07, 1,788.62 and 706.64 is: 975.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.07 : 1,788.62 = 706.64 : x
  2. Step 2: Convert to fraction form
    1,296.07/1,788.62 = 706.64/x
  3. Step 3: Cross multiply
    1,296.07x = 1,788.62 × 706.64
  4. Step 4: Simplify right side
    1,296.07x = 1,263,897.96
  5. Step 5: Solve for x
    x = 1,263,897.96/1,296.07
  6. Step 6: Final answer
    x = 975.18

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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.