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Finding the Fourth Proportional to 303,477.30, 455,215.95 and 78,819.30

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Solution

The fourth proportional to 303,477.30, 455,215.95 and 78,819.30 is: 118,228.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,477.30 : 455,215.95 = 78,819.30 : x
  2. Step 2: Convert to fraction form
    303,477.30/455,215.95 = 78,819.30/x
  3. Step 3: Cross multiply
    303,477.30x = 455,215.95 × 78,819.30
  4. Step 4: Simplify right side
    303,477.30x = 35,879,802,527.84
  5. Step 5: Solve for x
    x = 35,879,802,527.84/303,477.30
  6. Step 6: Final answer
    x = 118,228.95

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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.