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Finding the Fourth Proportional to 579,695.12, 799,978.53 and 321,611.22

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Solution

The fourth proportional to 579,695.12, 799,978.53 and 321,611.22 is: 443,823.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,695.12 : 799,978.53 = 321,611.22 : x
  2. Step 2: Convert to fraction form
    579,695.12/799,978.53 = 321,611.22/x
  3. Step 3: Cross multiply
    579,695.12x = 799,978.53 × 321,611.22
  4. Step 4: Simplify right side
    579,695.12x = 257,282,071,007.11
  5. Step 5: Solve for x
    x = 257,282,071,007.11/579,695.12
  6. Step 6: Final answer
    x = 443,823.08

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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.