Home / 812,881.19-1,220,078.34-413,820.72

Finding the Fourth Proportional to 812,881.19, 1,220,078.34 and 413,820.72

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Solution

The fourth proportional to 812,881.19, 1,220,078.34 and 413,820.72 is: 621,116.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,881.19 : 1,220,078.34 = 413,820.72 : x
  2. Step 2: Convert to fraction form
    812,881.19/1,220,078.34 = 413,820.72/x
  3. Step 3: Cross multiply
    812,881.19x = 1,220,078.34 × 413,820.72
  4. Step 4: Simplify right side
    812,881.19x = 504,893,697,115.21
  5. Step 5: Solve for x
    x = 504,893,697,115.21/812,881.19
  6. Step 6: Final answer
    x = 621,116.22

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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.