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Finding the Fourth Proportional to 892,609.72, 1,231,810.14 and 490,201.72

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Solution

The fourth proportional to 892,609.72, 1,231,810.14 and 490,201.72 is: 676,483.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,609.72 : 1,231,810.14 = 490,201.72 : x
  2. Step 2: Convert to fraction form
    892,609.72/1,231,810.14 = 490,201.72/x
  3. Step 3: Cross multiply
    892,609.72x = 1,231,810.14 × 490,201.72
  4. Step 4: Simplify right side
    892,609.72x = 603,835,449,341.44
  5. Step 5: Solve for x
    x = 603,835,449,341.44/892,609.72
  6. Step 6: Final answer
    x = 676,483.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.