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Finding the Fourth Proportional to 303,959.20, 455,938.80 and 79,319.20

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Solution

The fourth proportional to 303,959.20, 455,938.80 and 79,319.20 is: 118,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,959.20 : 455,938.80 = 79,319.20 : x
  2. Step 2: Convert to fraction form
    303,959.20/455,938.80 = 79,319.20/x
  3. Step 3: Cross multiply
    303,959.20x = 455,938.80 × 79,319.20
  4. Step 4: Simplify right side
    303,959.20x = 36,164,700,864.96
  5. Step 5: Solve for x
    x = 36,164,700,864.96/303,959.20
  6. Step 6: Final answer
    x = 118,978.80

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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.