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Finding the Fourth Proportional to 303,478.58, 455,309.00 and 143,676.32

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Solution

The fourth proportional to 303,478.58, 455,309.00 and 143,676.32 is: 215,557.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,478.58 : 455,309.00 = 143,676.32 : x
  2. Step 2: Convert to fraction form
    303,478.58/455,309.00 = 143,676.32/x
  3. Step 3: Cross multiply
    303,478.58x = 455,309.00 × 143,676.32
  4. Step 4: Simplify right side
    303,478.58x = 65,417,119,126.74
  5. Step 5: Solve for x
    x = 65,417,119,126.74/303,478.58
  6. Step 6: Final answer
    x = 215,557.61

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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.