Home / 285,428.40-393,899.82-158,115.84

Finding the Fourth Proportional to 285,428.40, 393,899.82 and 158,115.84

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Solution

The fourth proportional to 285,428.40, 393,899.82 and 158,115.84 is: 218,204.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,428.40 : 393,899.82 = 158,115.84 : x
  2. Step 2: Convert to fraction form
    285,428.40/393,899.82 = 158,115.84/x
  3. Step 3: Cross multiply
    285,428.40x = 393,899.82 × 158,115.84
  4. Step 4: Simplify right side
    285,428.40x = 62,281,800,915.15
  5. Step 5: Solve for x
    x = 62,281,800,915.15/285,428.40
  6. Step 6: Final answer
    x = 218,204.64

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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.