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Finding the Fourth Proportional to 615,420.66, 848,611.00 and 400,161.54

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Solution

The fourth proportional to 615,420.66, 848,611.00 and 400,161.54 is: 551,787.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,420.66 : 848,611.00 = 400,161.54 : x
  2. Step 2: Convert to fraction form
    615,420.66/848,611.00 = 400,161.54/x
  3. Step 3: Cross multiply
    615,420.66x = 848,611.00 × 400,161.54
  4. Step 4: Simplify right side
    615,420.66x = 339,581,482,620.13
  5. Step 5: Solve for x
    x = 339,581,482,620.13/615,420.66
  6. Step 6: Final answer
    x = 551,787.59

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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.