Home / 285,622.20-428,023.70-210,153.40

Finding the Fourth Proportional to 285,622.20, 428,023.70 and 210,153.40

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Solution

The fourth proportional to 285,622.20, 428,023.70 and 210,153.40 is: 314,928.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,622.20 : 428,023.70 = 210,153.40 : x
  2. Step 2: Convert to fraction form
    285,622.20/428,023.70 = 210,153.40/x
  3. Step 3: Cross multiply
    285,622.20x = 428,023.70 × 210,153.40
  4. Step 4: Simplify right side
    285,622.20x = 89,950,635,835.58
  5. Step 5: Solve for x
    x = 89,950,635,835.58/285,622.20
  6. Step 6: Final answer
    x = 314,928.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.