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Finding the Fourth Proportional to 619,790.96, 930,184.72 and 320,359.28

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Solution

The fourth proportional to 619,790.96, 930,184.72 and 320,359.28 is: 480,796.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,790.96 : 930,184.72 = 320,359.28 : x
  2. Step 2: Convert to fraction form
    619,790.96/930,184.72 = 320,359.28/x
  3. Step 3: Cross multiply
    619,790.96x = 930,184.72 × 320,359.28
  4. Step 4: Simplify right side
    619,790.96x = 297,993,307,166.20
  5. Step 5: Solve for x
    x = 297,993,307,166.20/619,790.96
  6. Step 6: Final answer
    x = 480,796.47

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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.