Home / 810,004.20-1,215,006.30-432,090.60

Finding the Fourth Proportional to 810,004.20, 1,215,006.30 and 432,090.60

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Solution

The fourth proportional to 810,004.20, 1,215,006.30 and 432,090.60 is: 648,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,004.20 : 1,215,006.30 = 432,090.60 : x
  2. Step 2: Convert to fraction form
    810,004.20/1,215,006.30 = 432,090.60/x
  3. Step 3: Cross multiply
    810,004.20x = 1,215,006.30 × 432,090.60
  4. Step 4: Simplify right side
    810,004.20x = 524,992,801,170.78
  5. Step 5: Solve for x
    x = 524,992,801,170.78/810,004.20
  6. Step 6: Final answer
    x = 648,135.90

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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.