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Finding the Fourth Proportional to 672,679.40, 1,008,516.90 and 406,383.80

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Solution

The fourth proportional to 672,679.40, 1,008,516.90 and 406,383.80 is: 609,272.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,679.40 : 1,008,516.90 = 406,383.80 : x
  2. Step 2: Convert to fraction form
    672,679.40/1,008,516.90 = 406,383.80/x
  3. Step 3: Cross multiply
    672,679.40x = 1,008,516.90 × 406,383.80
  4. Step 4: Simplify right side
    672,679.40x = 409,844,930,186.22
  5. Step 5: Solve for x
    x = 409,844,930,186.22/672,679.40
  6. Step 6: Final answer
    x = 609,272.31

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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.