Home / 399,311.03-551,033.47-218,030.60

Finding the Fourth Proportional to 399,311.03, 551,033.47 and 218,030.60

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Solution

The fourth proportional to 399,311.03, 551,033.47 and 218,030.60 is: 300,873.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,311.03 : 551,033.47 = 218,030.60 : x
  2. Step 2: Convert to fraction form
    399,311.03/551,033.47 = 218,030.60/x
  3. Step 3: Cross multiply
    399,311.03x = 551,033.47 × 218,030.60
  4. Step 4: Simplify right side
    399,311.03x = 120,142,158,084.18
  5. Step 5: Solve for x
    x = 120,142,158,084.18/399,311.03
  6. Step 6: Final answer
    x = 300,873.63

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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.