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Finding the Fourth Proportional to 479,219.80, 718,700.10 and 142,259.80

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Solution

The fourth proportional to 479,219.80, 718,700.10 and 142,259.80 is: 213,351.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,219.80 : 718,700.10 = 142,259.80 : x
  2. Step 2: Convert to fraction form
    479,219.80/718,700.10 = 142,259.80/x
  3. Step 3: Cross multiply
    479,219.80x = 718,700.10 × 142,259.80
  4. Step 4: Simplify right side
    479,219.80x = 102,242,132,485.98
  5. Step 5: Solve for x
    x = 102,242,132,485.98/479,219.80
  6. Step 6: Final answer
    x = 213,351.23

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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.