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Finding the Fourth Proportional to 641,656.80, 962,485.20 and 430,149.60

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Solution

The fourth proportional to 641,656.80, 962,485.20 and 430,149.60 is: 645,224.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,656.80 : 962,485.20 = 430,149.60 : x
  2. Step 2: Convert to fraction form
    641,656.80/962,485.20 = 430,149.60/x
  3. Step 3: Cross multiply
    641,656.80x = 962,485.20 × 430,149.60
  4. Step 4: Simplify right side
    641,656.80x = 414,012,623,785.92
  5. Step 5: Solve for x
    x = 414,012,623,785.92/641,656.80
  6. Step 6: Final answer
    x = 645,224.40

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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.