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Finding the Fourth Proportional to 383,463.30, 530,135.95 and 287,803.92

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Solution

The fourth proportional to 383,463.30, 530,135.95 and 287,803.92 is: 397,887.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,463.30 : 530,135.95 = 287,803.92 : x
  2. Step 2: Convert to fraction form
    383,463.30/530,135.95 = 287,803.92/x
  3. Step 3: Cross multiply
    383,463.30x = 530,135.95 × 287,803.92
  4. Step 4: Simplify right side
    383,463.30x = 152,575,204,542.92
  5. Step 5: Solve for x
    x = 152,575,204,542.92/383,463.30
  6. Step 6: Final answer
    x = 397,887.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.