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Finding the Fourth Proportional to 391,728.54, 540,577.74 and 228,415.53

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Solution

The fourth proportional to 391,728.54, 540,577.74 and 228,415.53 is: 315,208.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,728.54 : 540,577.74 = 228,415.53 : x
  2. Step 2: Convert to fraction form
    391,728.54/540,577.74 = 228,415.53/x
  3. Step 3: Cross multiply
    391,728.54x = 540,577.74 × 228,415.53
  4. Step 4: Simplify right side
    391,728.54x = 123,476,350,988.30
  5. Step 5: Solve for x
    x = 123,476,350,988.30/391,728.54
  6. Step 6: Final answer
    x = 315,208.97

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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.