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Finding the Fourth Proportional to 470,063.52, 703,535.40 and 428,040.30

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Solution

The fourth proportional to 470,063.52, 703,535.40 and 428,040.30 is: 640,640.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,063.52 : 703,535.40 = 428,040.30 : x
  2. Step 2: Convert to fraction form
    470,063.52/703,535.40 = 428,040.30/x
  3. Step 3: Cross multiply
    470,063.52x = 703,535.40 × 428,040.30
  4. Step 4: Simplify right side
    470,063.52x = 301,141,503,676.62
  5. Step 5: Solve for x
    x = 301,141,503,676.62/470,063.52
  6. Step 6: Final answer
    x = 640,640.02

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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.