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Finding the Fourth Proportional to 611,128.63, 843,351.15 and 339,198.89

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Solution

The fourth proportional to 611,128.63, 843,351.15 and 339,198.89 is: 468,090.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,128.63 : 843,351.15 = 339,198.89 : x
  2. Step 2: Convert to fraction form
    611,128.63/843,351.15 = 339,198.89/x
  3. Step 3: Cross multiply
    611,128.63x = 843,351.15 × 339,198.89
  4. Step 4: Simplify right side
    611,128.63x = 286,063,776,068.60
  5. Step 5: Solve for x
    x = 286,063,776,068.60/611,128.63
  6. Step 6: Final answer
    x = 468,090.94

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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.