Home / 1,296.63-1,789.36-707.18

Finding the Fourth Proportional to 1,296.63, 1,789.36 and 707.18

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Solution

The fourth proportional to 1,296.63, 1,789.36 and 707.18 is: 975.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.63 : 1,789.36 = 707.18 : x
  2. Step 2: Convert to fraction form
    1,296.63/1,789.36 = 707.18/x
  3. Step 3: Cross multiply
    1,296.63x = 1,789.36 × 707.18
  4. Step 4: Simplify right side
    1,296.63x = 1,265,390.66
  5. Step 5: Solve for x
    x = 1,265,390.66/1,296.63
  6. Step 6: Final answer
    x = 975.91

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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.