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Finding the Fourth Proportional to 450,640.90, 621,221.89 and 343,023.49

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Solution

The fourth proportional to 450,640.90, 621,221.89 and 343,023.49 is: 472,868.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,640.90 : 621,221.89 = 343,023.49 : x
  2. Step 2: Convert to fraction form
    450,640.90/621,221.89 = 343,023.49/x
  3. Step 3: Cross multiply
    450,640.90x = 621,221.89 × 343,023.49
  4. Step 4: Simplify right side
    450,640.90x = 213,093,695,950.97
  5. Step 5: Solve for x
    x = 213,093,695,950.97/450,640.90
  6. Step 6: Final answer
    x = 472,868.08

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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.