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Finding the Fourth Proportional to 611,578.54, 843,989.70 and 339,671.62

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Solution

The fourth proportional to 611,578.54, 843,989.70 and 339,671.62 is: 468,753.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,578.54 : 843,989.70 = 339,671.62 : x
  2. Step 2: Convert to fraction form
    611,578.54/843,989.70 = 339,671.62/x
  3. Step 3: Cross multiply
    611,578.54x = 843,989.70 × 339,671.62
  4. Step 4: Simplify right side
    611,578.54x = 286,679,348,662.31
  5. Step 5: Solve for x
    x = 286,679,348,662.31/611,578.54
  6. Step 6: Final answer
    x = 468,753.12

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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.