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Finding the Fourth Proportional to 406,356.20, 609,534.30 and 264,638.60

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Solution

The fourth proportional to 406,356.20, 609,534.30 and 264,638.60 is: 396,957.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,356.20 : 609,534.30 = 264,638.60 : x
  2. Step 2: Convert to fraction form
    406,356.20/609,534.30 = 264,638.60/x
  3. Step 3: Cross multiply
    406,356.20x = 609,534.30 × 264,638.60
  4. Step 4: Simplify right side
    406,356.20x = 161,306,303,803.98
  5. Step 5: Solve for x
    x = 161,306,303,803.98/406,356.20
  6. Step 6: Final answer
    x = 396,957.90

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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.