Home / 391,933.28-540,983.05-255,988.01

Finding the Fourth Proportional to 391,933.28, 540,983.05 and 255,988.01

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Solution

The fourth proportional to 391,933.28, 540,983.05 and 255,988.01 is: 353,338.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,933.28 : 540,983.05 = 255,988.01 : x
  2. Step 2: Convert to fraction form
    391,933.28/540,983.05 = 255,988.01/x
  3. Step 3: Cross multiply
    391,933.28x = 540,983.05 × 255,988.01
  4. Step 4: Simplify right side
    391,933.28x = 138,485,175,125.72
  5. Step 5: Solve for x
    x = 138,485,175,125.72/391,933.28
  6. Step 6: Final answer
    x = 353,338.65

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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.