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Finding the Fourth Proportional to 615,423.70, 848,615.18 and 400,164.58

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Solution

The fourth proportional to 615,423.70, 848,615.18 and 400,164.58 is: 551,791.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,423.70 : 848,615.18 = 400,164.58 : x
  2. Step 2: Convert to fraction form
    615,423.70/848,615.18 = 400,164.58/x
  3. Step 3: Cross multiply
    615,423.70x = 848,615.18 × 400,164.58
  4. Step 4: Simplify right side
    615,423.70x = 339,585,737,086.32
  5. Step 5: Solve for x
    x = 339,585,737,086.32/615,423.70
  6. Step 6: Final answer
    x = 551,791.78

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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.