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Finding the Fourth Proportional to 303,813.50, 455,424.05 and 121,389.92

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Solution

The fourth proportional to 303,813.50, 455,424.05 and 121,389.92 is: 181,966.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,813.50 : 455,424.05 = 121,389.92 : x
  2. Step 2: Convert to fraction form
    303,813.50/455,424.05 = 121,389.92/x
  3. Step 3: Cross multiply
    303,813.50x = 455,424.05 × 121,389.92
  4. Step 4: Simplify right side
    303,813.50x = 55,283,890,437.61
  5. Step 5: Solve for x
    x = 55,283,890,437.61/303,813.50
  6. Step 6: Final answer
    x = 181,966.54

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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.