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Finding the Fourth Proportional to 660,993.31, 991,405.52 and 255,908.39

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Solution

The fourth proportional to 660,993.31, 991,405.52 and 255,908.39 is: 383,829.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,993.31 : 991,405.52 = 255,908.39 : x
  2. Step 2: Convert to fraction form
    660,993.31/991,405.52 = 255,908.39/x
  3. Step 3: Cross multiply
    660,993.31x = 991,405.52 × 255,908.39
  4. Step 4: Simplify right side
    660,993.31x = 253,708,988,803.94
  5. Step 5: Solve for x
    x = 253,708,988,803.94/660,993.31
  6. Step 6: Final answer
    x = 383,829.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.