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Finding the Fourth Proportional to 303,680.80, 455,521.20 and 93,318.40

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Solution

The fourth proportional to 303,680.80, 455,521.20 and 93,318.40 is: 139,977.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,680.80 : 455,521.20 = 93,318.40 : x
  2. Step 2: Convert to fraction form
    303,680.80/455,521.20 = 93,318.40/x
  3. Step 3: Cross multiply
    303,680.80x = 455,521.20 × 93,318.40
  4. Step 4: Simplify right side
    303,680.80x = 42,508,509,550.08
  5. Step 5: Solve for x
    x = 42,508,509,550.08/303,680.80
  6. Step 6: Final answer
    x = 139,977.60

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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.