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Finding the Fourth Proportional to 458,978.58, 687,975.66 and 221,995.26

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Solution

The fourth proportional to 458,978.58, 687,975.66 and 221,995.26 is: 332,754.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,978.58 : 687,975.66 = 221,995.26 : x
  2. Step 2: Convert to fraction form
    458,978.58/687,975.66 = 221,995.26/x
  3. Step 3: Cross multiply
    458,978.58x = 687,975.66 × 221,995.26
  4. Step 4: Simplify right side
    458,978.58x = 152,727,335,515.37
  5. Step 5: Solve for x
    x = 152,727,335,515.37/458,978.58
  6. Step 6: Final answer
    x = 332,754.82

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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.