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Finding the Fourth Proportional to 406,402.02, 609,977.25 and 206,865

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Solution

The fourth proportional to 406,402.02, 609,977.25 and 206,865 is: 310,487.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,402.02 : 609,977.25 = 206,865 : x
  2. Step 2: Convert to fraction form
    406,402.02/609,977.25 = 206,865/x
  3. Step 3: Cross multiply
    406,402.02x = 609,977.25 × 206,865
  4. Step 4: Simplify right side
    406,402.02x = 126,182,943,821.25
  5. Step 5: Solve for x
    x = 126,182,943,821.25/406,402.02
  6. Step 6: Final answer
    x = 310,487.98

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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.