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Finding the Fourth Proportional to 621,109.54, 857,024.22 and 349,139.62

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Solution

The fourth proportional to 621,109.54, 857,024.22 and 349,139.62 is: 481,752.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,109.54 : 857,024.22 = 349,139.62 : x
  2. Step 2: Convert to fraction form
    621,109.54/857,024.22 = 349,139.62/x
  3. Step 3: Cross multiply
    621,109.54x = 857,024.22 × 349,139.62
  4. Step 4: Simplify right side
    621,109.54x = 299,221,110,501.60
  5. Step 5: Solve for x
    x = 299,221,110,501.60/621,109.54
  6. Step 6: Final answer
    x = 481,752.56

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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.