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Finding the Fourth Proportional to 561,450.76, 774,821.18 and 306,818.36

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Solution

The fourth proportional to 561,450.76, 774,821.18 and 306,818.36 is: 423,419.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,450.76 : 774,821.18 = 306,818.36 : x
  2. Step 2: Convert to fraction form
    561,450.76/774,821.18 = 306,818.36/x
  3. Step 3: Cross multiply
    561,450.76x = 774,821.18 × 306,818.36
  4. Step 4: Simplify right side
    561,450.76x = 237,729,363,740.87
  5. Step 5: Solve for x
    x = 237,729,363,740.87/561,450.76
  6. Step 6: Final answer
    x = 423,419.79

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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.