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Finding the Fourth Proportional to 664,998.30, 997,627.05 and 285,918.30

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Solution

The fourth proportional to 664,998.30, 997,627.05 and 285,918.30 is: 428,933.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,998.30 : 997,627.05 = 285,918.30 : x
  2. Step 2: Convert to fraction form
    664,998.30/997,627.05 = 285,918.30/x
  3. Step 3: Cross multiply
    664,998.30x = 997,627.05 × 285,918.30
  4. Step 4: Simplify right side
    664,998.30x = 285,239,830,170.02
  5. Step 5: Solve for x
    x = 285,239,830,170.02/664,998.30
  6. Step 6: Final answer
    x = 428,933.17

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Double scale
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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.