Home / 399,455.28-551,245.37-218,167.20

Finding the Fourth Proportional to 399,455.28, 551,245.37 and 218,167.20

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Solution

The fourth proportional to 399,455.28, 551,245.37 and 218,167.20 is: 301,069.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,455.28 : 551,245.37 = 218,167.20 : x
  2. Step 2: Convert to fraction form
    399,455.28/551,245.37 = 218,167.20/x
  3. Step 3: Cross multiply
    399,455.28x = 551,245.37 × 218,167.20
  4. Step 4: Simplify right side
    399,455.28x = 120,263,657,795.03
  5. Step 5: Solve for x
    x = 120,263,657,795.03/399,455.28
  6. Step 6: Final answer
    x = 301,069.14

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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.