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Finding the Fourth Proportional to 411,428.80, 617,143.20 and 298,579.60

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Solution

The fourth proportional to 411,428.80, 617,143.20 and 298,579.60 is: 447,869.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,428.80 : 617,143.20 = 298,579.60 : x
  2. Step 2: Convert to fraction form
    411,428.80/617,143.20 = 298,579.60/x
  3. Step 3: Cross multiply
    411,428.80x = 617,143.20 × 298,579.60
  4. Step 4: Simplify right side
    411,428.80x = 184,266,369,798.72
  5. Step 5: Solve for x
    x = 184,266,369,798.72/411,428.80
  6. Step 6: Final answer
    x = 447,869.40

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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.