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Finding the Fourth Proportional to 543,366.31, 813,989.17 and 355,809.19

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Solution

The fourth proportional to 543,366.31, 813,989.17 and 355,809.19 is: 533,019.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,366.31 : 813,989.17 = 355,809.19 : x
  2. Step 2: Convert to fraction form
    543,366.31/813,989.17 = 355,809.19/x
  3. Step 3: Cross multiply
    543,366.31x = 813,989.17 × 355,809.19
  4. Step 4: Simplify right side
    543,366.31x = 289,624,824,321.98
  5. Step 5: Solve for x
    x = 289,624,824,321.98/543,366.31
  6. Step 6: Final answer
    x = 533,019.48

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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.