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Finding the Fourth Proportional to 561,528.18, 774,909.30 and 306,879.36

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Solution

The fourth proportional to 561,528.18, 774,909.30 and 306,879.36 is: 423,493.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,528.18 : 774,909.30 = 306,879.36 : x
  2. Step 2: Convert to fraction form
    561,528.18/774,909.30 = 306,879.36/x
  3. Step 3: Cross multiply
    561,528.18x = 774,909.30 × 306,879.36
  4. Step 4: Simplify right side
    561,528.18x = 237,803,670,042.05
  5. Step 5: Solve for x
    x = 237,803,670,042.05/561,528.18
  6. Step 6: Final answer
    x = 423,493.74

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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.