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Finding the Fourth Proportional to 665,117.20, 996,466.20 and 383,798.80

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Solution

The fourth proportional to 665,117.20, 996,466.20 and 383,798.80 is: 575,000.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,117.20 : 996,466.20 = 383,798.80 : x
  2. Step 2: Convert to fraction form
    665,117.20/996,466.20 = 383,798.80/x
  3. Step 3: Cross multiply
    665,117.20x = 996,466.20 × 383,798.80
  4. Step 4: Simplify right side
    665,117.20x = 382,442,531,800.56
  5. Step 5: Solve for x
    x = 382,442,531,800.56/665,117.20
  6. Step 6: Final answer
    x = 575,000.21

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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.