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Finding the Fourth Proportional to 406,937.80, 610,406.70 and 328,205.80

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Solution

The fourth proportional to 406,937.80, 610,406.70 and 328,205.80 is: 492,308.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,937.80 : 610,406.70 = 328,205.80 : x
  2. Step 2: Convert to fraction form
    406,937.80/610,406.70 = 328,205.80/x
  3. Step 3: Cross multiply
    406,937.80x = 610,406.70 × 328,205.80
  4. Step 4: Simplify right side
    406,937.80x = 200,339,019,298.86
  5. Step 5: Solve for x
    x = 200,339,019,298.86/406,937.80
  6. Step 6: Final answer
    x = 492,308.70

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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.