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Finding the Fourth Proportional to 280,601.41, 420,792.94 and 91,015.93

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Solution

The fourth proportional to 280,601.41, 420,792.94 and 91,015.93 is: 136,488.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,601.41 : 420,792.94 = 91,015.93 : x
  2. Step 2: Convert to fraction form
    280,601.41/420,792.94 = 91,015.93/x
  3. Step 3: Cross multiply
    280,601.41x = 420,792.94 × 91,015.93
  4. Step 4: Simplify right side
    280,601.41x = 38,298,862,650.66
  5. Step 5: Solve for x
    x = 38,298,862,650.66/280,601.41
  6. Step 6: Final answer
    x = 136,488.49

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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.