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Finding the Fourth Proportional to 525,978.92, 725,679.99 and 321,817.01

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Solution

The fourth proportional to 525,978.92, 725,679.99 and 321,817.01 is: 444,002.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,978.92 : 725,679.99 = 321,817.01 : x
  2. Step 2: Convert to fraction form
    525,978.92/725,679.99 = 321,817.01/x
  3. Step 3: Cross multiply
    525,978.92x = 725,679.99 × 321,817.01
  4. Step 4: Simplify right side
    525,978.92x = 233,536,160,970.23
  5. Step 5: Solve for x
    x = 233,536,160,970.23/525,978.92
  6. Step 6: Final answer
    x = 444,002.90

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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.