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Finding the Fourth Proportional to 664,805.76, 917,428.32 and 362,997.60

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Solution

The fourth proportional to 664,805.76, 917,428.32 and 362,997.60 is: 500,934.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,805.76 : 917,428.32 = 362,997.60 : x
  2. Step 2: Convert to fraction form
    664,805.76/917,428.32 = 362,997.60/x
  3. Step 3: Cross multiply
    664,805.76x = 917,428.32 × 362,997.60
  4. Step 4: Simplify right side
    664,805.76x = 333,024,278,332.03
  5. Step 5: Solve for x
    x = 333,024,278,332.03/664,805.76
  6. Step 6: Final answer
    x = 500,934.71

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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.