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Finding the Fourth Proportional to 458,079.30, 631,485.72 and 321,697.98

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Solution

The fourth proportional to 458,079.30, 631,485.72 and 321,697.98 is: 443,477.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,079.30 : 631,485.72 = 321,697.98 : x
  2. Step 2: Convert to fraction form
    458,079.30/631,485.72 = 321,697.98/x
  3. Step 3: Cross multiply
    458,079.30x = 631,485.72 × 321,697.98
  4. Step 4: Simplify right side
    458,079.30x = 203,147,680,522.85
  5. Step 5: Solve for x
    x = 203,147,680,522.85/458,079.30
  6. Step 6: Final answer
    x = 443,477.10

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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.