Home / 715,140.36-986,481.09-428,494.35

Finding the Fourth Proportional to 715,140.36, 986,481.09 and 428,494.35

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Solution

The fourth proportional to 715,140.36, 986,481.09 and 428,494.35 is: 591,074.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,140.36 : 986,481.09 = 428,494.35 : x
  2. Step 2: Convert to fraction form
    715,140.36/986,481.09 = 428,494.35/x
  3. Step 3: Cross multiply
    715,140.36x = 986,481.09 × 428,494.35
  4. Step 4: Simplify right side
    715,140.36x = 422,701,573,446.84
  5. Step 5: Solve for x
    x = 422,701,573,446.84/715,140.36
  6. Step 6: Final answer
    x = 591,074.98

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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.