Home / 815,999.60-1,223,999.40-255,090.80

Finding the Fourth Proportional to 815,999.60, 1,223,999.40 and 255,090.80

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Solution

The fourth proportional to 815,999.60, 1,223,999.40 and 255,090.80 is: 382,636.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,999.60 : 1,223,999.40 = 255,090.80 : x
  2. Step 2: Convert to fraction form
    815,999.60/1,223,999.40 = 255,090.80/x
  3. Step 3: Cross multiply
    815,999.60x = 1,223,999.40 × 255,090.80
  4. Step 4: Simplify right side
    815,999.60x = 312,230,986,145.52
  5. Step 5: Solve for x
    x = 312,230,986,145.52/815,999.60
  6. Step 6: Final answer
    x = 382,636.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.