Home / 389,801.05-538,441.70-313,607.18

Finding the Fourth Proportional to 389,801.05, 538,441.70 and 313,607.18

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Solution

The fourth proportional to 389,801.05, 538,441.70 and 313,607.18 is: 433,193.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,801.05 : 538,441.70 = 313,607.18 : x
  2. Step 2: Convert to fraction form
    389,801.05/538,441.70 = 313,607.18/x
  3. Step 3: Cross multiply
    389,801.05x = 538,441.70 × 313,607.18
  4. Step 4: Simplify right side
    389,801.05x = 168,859,183,131.41
  5. Step 5: Solve for x
    x = 168,859,183,131.41/389,801.05
  6. Step 6: Final answer
    x = 433,193.25

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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.