Home / 1,296.21-1,788.81-706.79

Finding the Fourth Proportional to 1,296.21, 1,788.81 and 706.79

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Solution

The fourth proportional to 1,296.21, 1,788.81 and 706.79 is: 975.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.21 : 1,788.81 = 706.79 : x
  2. Step 2: Convert to fraction form
    1,296.21/1,788.81 = 706.79/x
  3. Step 3: Cross multiply
    1,296.21x = 1,788.81 × 706.79
  4. Step 4: Simplify right side
    1,296.21x = 1,264,304.08
  5. Step 5: Solve for x
    x = 1,264,304.08/1,296.21
  6. Step 6: Final answer
    x = 975.39

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1.5x scale

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.