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Finding the Fourth Proportional to 721,960.75, 994,080.49 and 641,248.03

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Solution

The fourth proportional to 721,960.75, 994,080.49 and 641,248.03 is: 882,945.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,960.75 : 994,080.49 = 641,248.03 : x
  2. Step 2: Convert to fraction form
    721,960.75/994,080.49 = 641,248.03/x
  3. Step 3: Cross multiply
    721,960.75x = 994,080.49 × 641,248.03
  4. Step 4: Simplify right side
    721,960.75x = 637,452,155,873.94
  5. Step 5: Solve for x
    x = 637,452,155,873.94/721,960.75
  6. Step 6: Final answer
    x = 882,945.72

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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.