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Finding the Fourth Proportional to 303,319.20, 454,978.80 and 208,840.80

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Solution

The fourth proportional to 303,319.20, 454,978.80 and 208,840.80 is: 313,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,319.20 : 454,978.80 = 208,840.80 : x
  2. Step 2: Convert to fraction form
    303,319.20/454,978.80 = 208,840.80/x
  3. Step 3: Cross multiply
    303,319.20x = 454,978.80 × 208,840.80
  4. Step 4: Simplify right side
    303,319.20x = 95,018,136,575.04
  5. Step 5: Solve for x
    x = 95,018,136,575.04/303,319.20
  6. Step 6: Final answer
    x = 313,261.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.