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Finding the Fourth Proportional to 561,028.80, 774,225.90 and 306,387.48

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Solution

The fourth proportional to 561,028.80, 774,225.90 and 306,387.48 is: 422,818.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,028.80 : 774,225.90 = 306,387.48 : x
  2. Step 2: Convert to fraction form
    561,028.80/774,225.90 = 306,387.48/x
  3. Step 3: Cross multiply
    561,028.80x = 774,225.90 × 306,387.48
  4. Step 4: Simplify right side
    561,028.80x = 237,213,122,451.73
  5. Step 5: Solve for x
    x = 237,213,122,451.73/561,028.80
  6. Step 6: Final answer
    x = 422,818.08

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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.