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Finding the Fourth Proportional to 579,813.02, 799,905.74 and 388,887.92

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Solution

The fourth proportional to 579,813.02, 799,905.74 and 388,887.92 is: 536,506.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,813.02 : 799,905.74 = 388,887.92 : x
  2. Step 2: Convert to fraction form
    579,813.02/799,905.74 = 388,887.92/x
  3. Step 3: Cross multiply
    579,813.02x = 799,905.74 × 388,887.92
  4. Step 4: Simplify right side
    579,813.02x = 311,073,673,480.69
  5. Step 5: Solve for x
    x = 311,073,673,480.69/579,813.02
  6. Step 6: Final answer
    x = 536,506.88

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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.