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Finding the Fourth Proportional to 615,422.63, 848,613.71 and 400,163.51

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Solution

The fourth proportional to 615,422.63, 848,613.71 and 400,163.51 is: 551,790.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,422.63 : 848,613.71 = 400,163.51 : x
  2. Step 2: Convert to fraction form
    615,422.63/848,613.71 = 400,163.51/x
  3. Step 3: Cross multiply
    615,422.63x = 848,613.71 × 400,163.51
  4. Step 4: Simplify right side
    615,422.63x = 339,584,240,827.72
  5. Step 5: Solve for x
    x = 339,584,240,827.72/615,422.63
  6. Step 6: Final answer
    x = 551,790.31

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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.