Home / 621,142.30-857,156.52-349,221.70

Finding the Fourth Proportional to 621,142.30, 857,156.52 and 349,221.70

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Solution

The fourth proportional to 621,142.30, 857,156.52 and 349,221.70 is: 481,914.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,142.30 : 857,156.52 = 349,221.70 : x
  2. Step 2: Convert to fraction form
    621,142.30/857,156.52 = 349,221.70/x
  3. Step 3: Cross multiply
    621,142.30x = 857,156.52 × 349,221.70
  4. Step 4: Simplify right side
    621,142.30x = 299,337,657,080.48
  5. Step 5: Solve for x
    x = 299,337,657,080.48/621,142.30
  6. Step 6: Final answer
    x = 481,914.78

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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.