Home / 621,142.80-857,157.21-349,222.20

Finding the Fourth Proportional to 621,142.80, 857,157.21 and 349,222.20

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Solution

The fourth proportional to 621,142.80, 857,157.21 and 349,222.20 is: 481,915.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,142.80 : 857,157.21 = 349,222.20 : x
  2. Step 2: Convert to fraction form
    621,142.80/857,157.21 = 349,222.20/x
  3. Step 3: Cross multiply
    621,142.80x = 857,157.21 × 349,222.20
  4. Step 4: Simplify right side
    621,142.80x = 299,338,326,622.06
  5. Step 5: Solve for x
    x = 299,338,326,622.06/621,142.80
  6. Step 6: Final answer
    x = 481,915.47

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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.