Home / 391,768.10-540,632.25-228,455.06

Finding the Fourth Proportional to 391,768.10, 540,632.25 and 228,455.06

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Solution

The fourth proportional to 391,768.10, 540,632.25 and 228,455.06 is: 315,263.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,768.10 : 540,632.25 = 228,455.06 : x
  2. Step 2: Convert to fraction form
    391,768.10/540,632.25 = 228,455.06/x
  3. Step 3: Cross multiply
    391,768.10x = 540,632.25 × 228,455.06
  4. Step 4: Simplify right side
    391,768.10x = 123,510,173,111.69
  5. Step 5: Solve for x
    x = 123,510,173,111.69/391,768.10
  6. Step 6: Final answer
    x = 315,263.48

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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.