Home / 311,398.02-429,799.20-203,905.62

Finding the Fourth Proportional to 311,398.02, 429,799.20 and 203,905.62

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Solution

The fourth proportional to 311,398.02, 429,799.20 and 203,905.62 is: 281,435.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,398.02 : 429,799.20 = 203,905.62 : x
  2. Step 2: Convert to fraction form
    311,398.02/429,799.20 = 203,905.62/x
  3. Step 3: Cross multiply
    311,398.02x = 429,799.20 × 203,905.62
  4. Step 4: Simplify right side
    311,398.02x = 87,638,472,351.50
  5. Step 5: Solve for x
    x = 87,638,472,351.50/311,398.02
  6. Step 6: Final answer
    x = 281,435.55

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1.5x scale

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.