Home / 621,140.80-857,154.45-349,220.20

Finding the Fourth Proportional to 621,140.80, 857,154.45 and 349,220.20

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Solution

The fourth proportional to 621,140.80, 857,154.45 and 349,220.20 is: 481,912.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,140.80 : 857,154.45 = 349,220.20 : x
  2. Step 2: Convert to fraction form
    621,140.80/857,154.45 = 349,220.20/x
  3. Step 3: Cross multiply
    621,140.80x = 857,154.45 × 349,220.20
  4. Step 4: Simplify right side
    621,140.80x = 299,335,648,459.89
  5. Step 5: Solve for x
    x = 299,335,648,459.89/621,140.80
  6. Step 6: Final answer
    x = 481,912.71

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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.