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Finding the Fourth Proportional to 449,782.72, 620,640.17 and 288,855.57

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Solution

The fourth proportional to 449,782.72, 620,640.17 and 288,855.57 is: 398,582.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,782.72 : 620,640.17 = 288,855.57 : x
  2. Step 2: Convert to fraction form
    449,782.72/620,640.17 = 288,855.57/x
  3. Step 3: Cross multiply
    449,782.72x = 620,640.17 × 288,855.57
  4. Step 4: Simplify right side
    449,782.72x = 179,275,365,522.77
  5. Step 5: Solve for x
    x = 179,275,365,522.77/449,782.72
  6. Step 6: Final answer
    x = 398,582.15

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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.