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Finding the Fourth Proportional to 722,128.76, 996,571.91 and 435,642.69

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Solution

The fourth proportional to 722,128.76, 996,571.91 and 435,642.69 is: 601,207.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,128.76 : 996,571.91 = 435,642.69 : x
  2. Step 2: Convert to fraction form
    722,128.76/996,571.91 = 435,642.69/x
  3. Step 3: Cross multiply
    722,128.76x = 996,571.91 × 435,642.69
  4. Step 4: Simplify right side
    722,128.76x = 434,149,265,472.62
  5. Step 5: Solve for x
    x = 434,149,265,472.62/722,128.76
  6. Step 6: Final answer
    x = 601,207.56

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Double scale
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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.