Home / 815,279.60-1,217,429.50-665,816.60

Finding the Fourth Proportional to 815,279.60, 1,217,429.50 and 665,816.60

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Solution

The fourth proportional to 815,279.60, 1,217,429.50 and 665,816.60 is: 994,241.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,279.60 : 1,217,429.50 = 665,816.60 : x
  2. Step 2: Convert to fraction form
    815,279.60/1,217,429.50 = 665,816.60/x
  3. Step 3: Cross multiply
    815,279.60x = 1,217,429.50 × 665,816.60
  4. Step 4: Simplify right side
    815,279.60x = 810,584,770,429.70
  5. Step 5: Solve for x
    x = 810,584,770,429.70/815,279.60
  6. Step 6: Final answer
    x = 994,241.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.