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Finding the Fourth Proportional to 485,625.83, 668,638.64 and 412,885.67

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Solution

The fourth proportional to 485,625.83, 668,638.64 and 412,885.67 is: 568,485.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,625.83 : 668,638.64 = 412,885.67 : x
  2. Step 2: Convert to fraction form
    485,625.83/668,638.64 = 412,885.67/x
  3. Step 3: Cross multiply
    485,625.83x = 668,638.64 × 412,885.67
  4. Step 4: Simplify right side
    485,625.83x = 276,071,310,553.31
  5. Step 5: Solve for x
    x = 276,071,310,553.31/485,625.83
  6. Step 6: Final answer
    x = 568,485.65

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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.