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Finding the Fourth Proportional to 619,563.30, 928,178.55 and 319,020.90

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Solution

The fourth proportional to 619,563.30, 928,178.55 and 319,020.90 is: 477,930.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,563.30 : 928,178.55 = 319,020.90 : x
  2. Step 2: Convert to fraction form
    619,563.30/928,178.55 = 319,020.90/x
  3. Step 3: Cross multiply
    619,563.30x = 928,178.55 × 319,020.90
  4. Step 4: Simplify right side
    619,563.30x = 296,108,356,381.70
  5. Step 5: Solve for x
    x = 296,108,356,381.70/619,563.30
  6. Step 6: Final answer
    x = 477,930.76

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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.