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Finding the Fourth Proportional to 642,216.96, 886,198.32 and 355,730.94

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Solution

The fourth proportional to 642,216.96, 886,198.32 and 355,730.94 is: 490,874.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,216.96 : 886,198.32 = 355,730.94 : x
  2. Step 2: Convert to fraction form
    642,216.96/886,198.32 = 355,730.94/x
  3. Step 3: Cross multiply
    642,216.96x = 886,198.32 × 355,730.94
  4. Step 4: Simplify right side
    642,216.96x = 315,248,161,400.02
  5. Step 5: Solve for x
    x = 315,248,161,400.02/642,216.96
  6. Step 6: Final answer
    x = 490,874.86

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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.