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Finding the Fourth Proportional to 650,899.25, 972,390.64 and 421,324.70

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Solution

The fourth proportional to 650,899.25, 972,390.64 and 421,324.70 is: 629,424.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    650,899.25 : 972,390.64 = 421,324.70 : x
  2. Step 2: Convert to fraction form
    650,899.25/972,390.64 = 421,324.70/x
  3. Step 3: Cross multiply
    650,899.25x = 972,390.64 × 421,324.70
  4. Step 4: Simplify right side
    650,899.25x = 409,692,188,765.54
  5. Step 5: Solve for x
    x = 409,692,188,765.54/650,899.25
  6. Step 6: Final answer
    x = 629,424.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.