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Finding the Fourth Proportional to 376,728.60, 565,530.30 and 216,931.80

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Solution

The fourth proportional to 376,728.60, 565,530.30 and 216,931.80 is: 325,649.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,728.60 : 565,530.30 = 216,931.80 : x
  2. Step 2: Convert to fraction form
    376,728.60/565,530.30 = 216,931.80/x
  3. Step 3: Cross multiply
    376,728.60x = 565,530.30 × 216,931.80
  4. Step 4: Simplify right side
    376,728.60x = 122,681,505,933.54
  5. Step 5: Solve for x
    x = 122,681,505,933.54/376,728.60
  6. Step 6: Final answer
    x = 325,649.57

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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.