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Finding the Fourth Proportional to 397,600.40, 548,681.00 and 220,784.88

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Solution

The fourth proportional to 397,600.40, 548,681.00 and 220,784.88 is: 304,678.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,600.40 : 548,681.00 = 220,784.88 : x
  2. Step 2: Convert to fraction form
    397,600.40/548,681.00 = 220,784.88/x
  3. Step 3: Cross multiply
    397,600.40x = 548,681.00 × 220,784.88
  4. Step 4: Simplify right side
    397,600.40x = 121,140,467,639.36
  5. Step 5: Solve for x
    x = 121,140,467,639.36/397,600.40
  6. Step 6: Final answer
    x = 304,678.94

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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.