Home / 621,139.30-857,152.38-349,218.70

Finding the Fourth Proportional to 621,139.30, 857,152.38 and 349,218.70

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Solution

The fourth proportional to 621,139.30, 857,152.38 and 349,218.70 is: 481,910.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,139.30 : 857,152.38 = 349,218.70 : x
  2. Step 2: Convert to fraction form
    621,139.30/857,152.38 = 349,218.70/x
  3. Step 3: Cross multiply
    621,139.30x = 857,152.38 × 349,218.70
  4. Step 4: Simplify right side
    621,139.30x = 299,333,639,845.51
  5. Step 5: Solve for x
    x = 299,333,639,845.51/621,139.30
  6. Step 6: Final answer
    x = 481,910.64

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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.