Home / 399,319.21-551,056.33-218,030.58

Finding the Fourth Proportional to 399,319.21, 551,056.33 and 218,030.58

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Solution

The fourth proportional to 399,319.21, 551,056.33 and 218,030.58 is: 300,879.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,319.21 : 551,056.33 = 218,030.58 : x
  2. Step 2: Convert to fraction form
    399,319.21/551,056.33 = 218,030.58/x
  3. Step 3: Cross multiply
    399,319.21x = 551,056.33 × 218,030.58
  4. Step 4: Simplify right side
    399,319.21x = 120,147,131,242.57
  5. Step 5: Solve for x
    x = 120,147,131,242.57/399,319.21
  6. Step 6: Final answer
    x = 300,879.92

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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.