Home / 426,935.21-639,655.13-380,599.97

Finding the Fourth Proportional to 426,935.21, 639,655.13 and 380,599.97

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Solution

The fourth proportional to 426,935.21, 639,655.13 and 380,599.97 is: 570,233.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,935.21 : 639,655.13 = 380,599.97 : x
  2. Step 2: Convert to fraction form
    426,935.21/639,655.13 = 380,599.97/x
  3. Step 3: Cross multiply
    426,935.21x = 639,655.13 × 380,599.97
  4. Step 4: Simplify right side
    426,935.21x = 243,452,718,900.70
  5. Step 5: Solve for x
    x = 243,452,718,900.70/426,935.21
  6. Step 6: Final answer
    x = 570,233.41

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1.5x scale

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.