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Finding the Fourth Proportional to 399,989.20, 600,070.20 and 119,534.80

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Solution

The fourth proportional to 399,989.20, 600,070.20 and 119,534.80 is: 179,328.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,989.20 : 600,070.20 = 119,534.80 : x
  2. Step 2: Convert to fraction form
    399,989.20/600,070.20 = 119,534.80/x
  3. Step 3: Cross multiply
    399,989.20x = 600,070.20 × 119,534.80
  4. Step 4: Simplify right side
    399,989.20x = 71,729,271,342.96
  5. Step 5: Solve for x
    x = 71,729,271,342.96/399,989.20
  6. Step 6: Final answer
    x = 179,328.02

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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.