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Finding the Fourth Proportional to 519,717.80, 779,868.30 and 220,147.40

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Solution

The fourth proportional to 519,717.80, 779,868.30 and 220,147.40 is: 330,344.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,717.80 : 779,868.30 = 220,147.40 : x
  2. Step 2: Convert to fraction form
    519,717.80/779,868.30 = 220,147.40/x
  3. Step 3: Cross multiply
    519,717.80x = 779,868.30 × 220,147.40
  4. Step 4: Simplify right side
    519,717.80x = 171,685,978,587.42
  5. Step 5: Solve for x
    x = 171,685,978,587.42/519,717.80
  6. Step 6: Final answer
    x = 330,344.62

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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.