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Finding the Fourth Proportional to 817,262.88, 1,127,978.10 and 511,481.40

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Solution

The fourth proportional to 817,262.88, 1,127,978.10 and 511,481.40 is: 705,941.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,262.88 : 1,127,978.10 = 511,481.40 : x
  2. Step 2: Convert to fraction form
    817,262.88/1,127,978.10 = 511,481.40/x
  3. Step 3: Cross multiply
    817,262.88x = 1,127,978.10 × 511,481.40
  4. Step 4: Simplify right side
    817,262.88x = 576,939,817,757.34
  5. Step 5: Solve for x
    x = 576,939,817,757.34/817,262.88
  6. Step 6: Final answer
    x = 705,941.54

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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.