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Finding the Fourth Proportional to 285,845.70, 428,768.55 and 98,876.10

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Solution

The fourth proportional to 285,845.70, 428,768.55 and 98,876.10 is: 148,314.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,845.70 : 428,768.55 = 98,876.10 : x
  2. Step 2: Convert to fraction form
    285,845.70/428,768.55 = 98,876.10/x
  3. Step 3: Cross multiply
    285,845.70x = 428,768.55 × 98,876.10
  4. Step 4: Simplify right side
    285,845.70x = 42,394,962,026.66
  5. Step 5: Solve for x
    x = 42,394,962,026.66/285,845.70
  6. Step 6: Final answer
    x = 148,314.15

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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.