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Finding the Fourth Proportional to 411,430.60, 617,145.90 and 328,486.60

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Solution

The fourth proportional to 411,430.60, 617,145.90 and 328,486.60 is: 492,729.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,430.60 : 617,145.90 = 328,486.60 : x
  2. Step 2: Convert to fraction form
    411,430.60/617,145.90 = 328,486.60/x
  3. Step 3: Cross multiply
    411,430.60x = 617,145.90 × 328,486.60
  4. Step 4: Simplify right side
    411,430.60x = 202,724,158,394.94
  5. Step 5: Solve for x
    x = 202,724,158,394.94/411,430.60
  6. Step 6: Final answer
    x = 492,729.90

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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.