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Finding the Fourth Proportional to 561,388.48, 774,706.98 and 306,734.20

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Solution

The fourth proportional to 561,388.48, 774,706.98 and 306,734.20 is: 423,288.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,388.48 : 774,706.98 = 306,734.20 : x
  2. Step 2: Convert to fraction form
    561,388.48/774,706.98 = 306,734.20/x
  3. Step 3: Cross multiply
    561,388.48x = 774,706.98 × 306,734.20
  4. Step 4: Simplify right side
    561,388.48x = 237,629,125,744.72
  5. Step 5: Solve for x
    x = 237,629,125,744.72/561,388.48
  6. Step 6: Final answer
    x = 423,288.21

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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.