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Finding the Fourth Proportional to 303,505.29, 455,280.21 and 87,355.17

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Solution

The fourth proportional to 303,505.29, 455,280.21 and 87,355.17 is: 131,039.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,505.29 : 455,280.21 = 87,355.17 : x
  2. Step 2: Convert to fraction form
    303,505.29/455,280.21 = 87,355.17/x
  3. Step 3: Cross multiply
    303,505.29x = 455,280.21 × 87,355.17
  4. Step 4: Simplify right side
    303,505.29x = 39,771,080,142.19
  5. Step 5: Solve for x
    x = 39,771,080,142.19/303,505.29
  6. Step 6: Final answer
    x = 131,039.17

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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.