Home / 810,020.40-1,214,447.40-455,143.20

Finding the Fourth Proportional to 810,020.40, 1,214,447.40 and 455,143.20

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Solution

The fourth proportional to 810,020.40, 1,214,447.40 and 455,143.20 is: 682,387.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,020.40 : 1,214,447.40 = 455,143.20 : x
  2. Step 2: Convert to fraction form
    810,020.40/1,214,447.40 = 455,143.20/x
  3. Step 3: Cross multiply
    810,020.40x = 1,214,447.40 × 455,143.20
  4. Step 4: Simplify right side
    810,020.40x = 552,747,475,867.68
  5. Step 5: Solve for x
    x = 552,747,475,867.68/810,020.40
  6. Step 6: Final answer
    x = 682,387.11

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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.