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Finding the Fourth Proportional to 722,128.25, 996,571.22 and 435,642.19

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Solution

The fourth proportional to 722,128.25, 996,571.22 and 435,642.19 is: 601,206.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,128.25 : 996,571.22 = 435,642.19 : x
  2. Step 2: Convert to fraction form
    722,128.25/996,571.22 = 435,642.19/x
  3. Step 3: Cross multiply
    722,128.25x = 996,571.22 × 435,642.19
  4. Step 4: Simplify right side
    722,128.25x = 434,148,464,102.13
  5. Step 5: Solve for x
    x = 434,148,464,102.13/722,128.25
  6. Step 6: Final answer
    x = 601,206.87

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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.