Home / 389,931.10-538,108.64-228,788.90

Finding the Fourth Proportional to 389,931.10, 538,108.64 and 228,788.90

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Solution

The fourth proportional to 389,931.10, 538,108.64 and 228,788.90 is: 315,730.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,931.10 : 538,108.64 = 228,788.90 : x
  2. Step 2: Convert to fraction form
    389,931.10/538,108.64 = 228,788.90/x
  3. Step 3: Cross multiply
    389,931.10x = 538,108.64 × 228,788.90
  4. Step 4: Simplify right side
    389,931.10x = 123,113,283,826.10
  5. Step 5: Solve for x
    x = 123,113,283,826.10/389,931.10
  6. Step 6: Final answer
    x = 315,730.87

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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.