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Finding the Fourth Proportional to 285,092.40, 427,640.40 and 74,728.50

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Solution

The fourth proportional to 285,092.40, 427,640.40 and 74,728.50 is: 112,093.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,092.40 : 427,640.40 = 74,728.50 : x
  2. Step 2: Convert to fraction form
    285,092.40/427,640.40 = 74,728.50/x
  3. Step 3: Cross multiply
    285,092.40x = 427,640.40 × 74,728.50
  4. Step 4: Simplify right side
    285,092.40x = 31,956,925,631.40
  5. Step 5: Solve for x
    x = 31,956,925,631.40/285,092.40
  6. Step 6: Final answer
    x = 112,093.22

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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.