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Finding the Fourth Proportional to 455,539.80, 683,309.70 and 306,240.60

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Solution

The fourth proportional to 455,539.80, 683,309.70 and 306,240.60 is: 459,360.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,539.80 : 683,309.70 = 306,240.60 : x
  2. Step 2: Convert to fraction form
    455,539.80/683,309.70 = 306,240.60/x
  3. Step 3: Cross multiply
    455,539.80x = 683,309.70 × 306,240.60
  4. Step 4: Simplify right side
    455,539.80x = 209,257,172,513.82
  5. Step 5: Solve for x
    x = 209,257,172,513.82/455,539.80
  6. Step 6: Final answer
    x = 459,360.90

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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.