Home / 390,039.28-538,082.76-228,812.56

Finding the Fourth Proportional to 390,039.28, 538,082.76 and 228,812.56

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Solution

The fourth proportional to 390,039.28, 538,082.76 and 228,812.56 is: 315,660.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,039.28 : 538,082.76 = 228,812.56 : x
  2. Step 2: Convert to fraction form
    390,039.28/538,082.76 = 228,812.56/x
  3. Step 3: Cross multiply
    390,039.28x = 538,082.76 × 228,812.56
  4. Step 4: Simplify right side
    390,039.28x = 123,120,093,807.47
  5. Step 5: Solve for x
    x = 123,120,093,807.47/390,039.28
  6. Step 6: Final answer
    x = 315,660.76

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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.