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Finding the Fourth Proportional to 303,511.10, 455,266.65 and 145,658.30

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Solution

The fourth proportional to 303,511.10, 455,266.65 and 145,658.30 is: 218,487.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,511.10 : 455,266.65 = 145,658.30 : x
  2. Step 2: Convert to fraction form
    303,511.10/455,266.65 = 145,658.30/x
  3. Step 3: Cross multiply
    303,511.10x = 455,266.65 × 145,658.30
  4. Step 4: Simplify right side
    303,511.10x = 66,313,366,285.70
  5. Step 5: Solve for x
    x = 66,313,366,285.70/303,511.10
  6. Step 6: Final answer
    x = 218,487.45

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Similar ratio
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1.5x scale

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.