Home / 621,120.15-857,140.64-349,189.25

Finding the Fourth Proportional to 621,120.15, 857,140.64 and 349,189.25

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Solution

The fourth proportional to 621,120.15, 857,140.64 and 349,189.25 is: 481,878.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,120.15 : 857,140.64 = 349,189.25 : x
  2. Step 2: Convert to fraction form
    621,120.15/857,140.64 = 349,189.25/x
  3. Step 3: Cross multiply
    621,120.15x = 857,140.64 × 349,189.25
  4. Step 4: Simplify right side
    621,120.15x = 299,304,297,027.67
  5. Step 5: Solve for x
    x = 299,304,297,027.67/621,120.15
  6. Step 6: Final answer
    x = 481,878.26

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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.