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Finding the Fourth Proportional to 627,743.40, 940,059.90 and 402,757.80

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Solution

The fourth proportional to 627,743.40, 940,059.90 and 402,757.80 is: 603,138.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,743.40 : 940,059.90 = 402,757.80 : x
  2. Step 2: Convert to fraction form
    627,743.40/940,059.90 = 402,757.80/x
  3. Step 3: Cross multiply
    627,743.40x = 940,059.90 × 402,757.80
  4. Step 4: Simplify right side
    627,743.40x = 378,616,457,192.22
  5. Step 5: Solve for x
    x = 378,616,457,192.22/627,743.40
  6. Step 6: Final answer
    x = 603,138.89

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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.