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Finding the Fourth Proportional to 719,179.11, 992,491 and 392,509.95

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Solution

The fourth proportional to 719,179.11, 992,491 and 392,509.95 is: 541,676.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,179.11 : 992,491 = 392,509.95 : x
  2. Step 2: Convert to fraction form
    719,179.11/992,491 = 392,509.95/x
  3. Step 3: Cross multiply
    719,179.11x = 992,491 × 392,509.95
  4. Step 4: Simplify right side
    719,179.11x = 389,562,592,785.45
  5. Step 5: Solve for x
    x = 389,562,592,785.45/719,179.11
  6. Step 6: Final answer
    x = 541,676.74

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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.