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Finding the Fourth Proportional to 591,013.87, 885,247.45 and 400,428.56

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Solution

The fourth proportional to 591,013.87, 885,247.45 and 400,428.56 is: 599,780.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,013.87 : 885,247.45 = 400,428.56 : x
  2. Step 2: Convert to fraction form
    591,013.87/885,247.45 = 400,428.56/x
  3. Step 3: Cross multiply
    591,013.87x = 885,247.45 × 400,428.56
  4. Step 4: Simplify right side
    591,013.87x = 354,478,362,859.22
  5. Step 5: Solve for x
    x = 354,478,362,859.22/591,013.87
  6. Step 6: Final answer
    x = 599,780.11

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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.