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Finding the Fourth Proportional to 406,431.40, 609,647.10 and 169,772.20

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Solution

The fourth proportional to 406,431.40, 609,647.10 and 169,772.20 is: 254,658.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,431.40 : 609,647.10 = 169,772.20 : x
  2. Step 2: Convert to fraction form
    406,431.40/609,647.10 = 169,772.20/x
  3. Step 3: Cross multiply
    406,431.40x = 609,647.10 × 169,772.20
  4. Step 4: Simplify right side
    406,431.40x = 103,501,129,390.62
  5. Step 5: Solve for x
    x = 103,501,129,390.62/406,431.40
  6. Step 6: Final answer
    x = 254,658.30

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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.