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Finding the Fourth Proportional to 561,222.28, 774,503.78 and 306,589.87

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Solution

The fourth proportional to 561,222.28, 774,503.78 and 306,589.87 is: 423,103.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,222.28 : 774,503.78 = 306,589.87 : x
  2. Step 2: Convert to fraction form
    561,222.28/774,503.78 = 306,589.87/x
  3. Step 3: Cross multiply
    561,222.28x = 774,503.78 × 306,589.87
  4. Step 4: Simplify right side
    561,222.28x = 237,455,012,659.89
  5. Step 5: Solve for x
    x = 237,455,012,659.89/561,222.28
  6. Step 6: Final answer
    x = 423,103.32

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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.