Home / 399,780.26-551,690.25-218,490.02

Finding the Fourth Proportional to 399,780.26, 551,690.25 and 218,490.02

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Solution

The fourth proportional to 399,780.26, 551,690.25 and 218,490.02 is: 301,512.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,780.26 : 551,690.25 = 218,490.02 : x
  2. Step 2: Convert to fraction form
    399,780.26/551,690.25 = 218,490.02/x
  3. Step 3: Cross multiply
    399,780.26x = 551,690.25 × 218,490.02
  4. Step 4: Simplify right side
    399,780.26x = 120,538,813,756.31
  5. Step 5: Solve for x
    x = 120,538,813,756.31/399,780.26
  6. Step 6: Final answer
    x = 301,512.67

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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.