Home / 693,431.40-1,040,147.10-426,325.80

Finding the Fourth Proportional to 693,431.40, 1,040,147.10 and 426,325.80

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Solution

The fourth proportional to 693,431.40, 1,040,147.10 and 426,325.80 is: 639,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,431.40 : 1,040,147.10 = 426,325.80 : x
  2. Step 2: Convert to fraction form
    693,431.40/1,040,147.10 = 426,325.80/x
  3. Step 3: Cross multiply
    693,431.40x = 1,040,147.10 × 426,325.80
  4. Step 4: Simplify right side
    693,431.40x = 443,441,544,525.18
  5. Step 5: Solve for x
    x = 443,441,544,525.18/693,431.40
  6. Step 6: Final answer
    x = 639,488.70

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Double scale
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Similar ratio
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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.