Home / 389,800.05-538,440.32-313,606.18

Finding the Fourth Proportional to 389,800.05, 538,440.32 and 313,606.18

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Solution

The fourth proportional to 389,800.05, 538,440.32 and 313,606.18 is: 433,191.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,800.05 : 538,440.32 = 313,606.18 : x
  2. Step 2: Convert to fraction form
    389,800.05/538,440.32 = 313,606.18/x
  3. Step 3: Cross multiply
    389,800.05x = 538,440.32 × 313,606.18
  4. Step 4: Simplify right side
    389,800.05x = 168,858,211,913.18
  5. Step 5: Solve for x
    x = 168,858,211,913.18/389,800.05
  6. Step 6: Final answer
    x = 433,191.87

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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.