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Finding the Fourth Proportional to 680,440.34, 939,006.60 and 422,221.26

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Solution

The fourth proportional to 680,440.34, 939,006.60 and 422,221.26 is: 582,664.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,440.34 : 939,006.60 = 422,221.26 : x
  2. Step 2: Convert to fraction form
    680,440.34/939,006.60 = 422,221.26/x
  3. Step 3: Cross multiply
    680,440.34x = 939,006.60 × 422,221.26
  4. Step 4: Simplify right side
    680,440.34x = 396,468,549,800.32
  5. Step 5: Solve for x
    x = 396,468,549,800.32/680,440.34
  6. Step 6: Final answer
    x = 582,664.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.