Home / 1,381,638.20-2,072,457.30-820,383.80

Finding the Fourth Proportional to 1,381,638.20, 2,072,457.30 and 820,383.80

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Solution

The fourth proportional to 1,381,638.20, 2,072,457.30 and 820,383.80 is: 1,230,575.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381,638.20 : 2,072,457.30 = 820,383.80 : x
  2. Step 2: Convert to fraction form
    1,381,638.20/2,072,457.30 = 820,383.80/x
  3. Step 3: Cross multiply
    1,381,638.20x = 2,072,457.30 × 820,383.80
  4. Step 4: Simplify right side
    1,381,638.20x = 1,700,210,395,111.74
  5. Step 5: Solve for x
    x = 1,700,210,395,111.74/1,381,638.20
  6. Step 6: Final answer
    x = 1,230,575.70

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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.