Home / 389,305.09-537,139.32-228,073.45

Finding the Fourth Proportional to 389,305.09, 537,139.32 and 228,073.45

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Solution

The fourth proportional to 389,305.09, 537,139.32 and 228,073.45 is: 314,681.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,305.09 : 537,139.32 = 228,073.45 : x
  2. Step 2: Convert to fraction form
    389,305.09/537,139.32 = 228,073.45/x
  3. Step 3: Cross multiply
    389,305.09x = 537,139.32 × 228,073.45
  4. Step 4: Simplify right side
    389,305.09x = 122,507,217,843.05
  5. Step 5: Solve for x
    x = 122,507,217,843.05/389,305.09
  6. Step 6: Final answer
    x = 314,681.78

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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.