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Finding the Fourth Proportional to 641,716.40, 962,574.60 and 442,650.80

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Solution

The fourth proportional to 641,716.40, 962,574.60 and 442,650.80 is: 663,976.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,716.40 : 962,574.60 = 442,650.80 : x
  2. Step 2: Convert to fraction form
    641,716.40/962,574.60 = 442,650.80/x
  3. Step 3: Cross multiply
    641,716.40x = 962,574.60 × 442,650.80
  4. Step 4: Simplify right side
    641,716.40x = 426,084,416,749.68
  5. Step 5: Solve for x
    x = 426,084,416,749.68/641,716.40
  6. Step 6: Final answer
    x = 663,976.20

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Double scale
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Similar ratio
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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.