Home / 429,961.19-591,991.20-390,103.11

Finding the Fourth Proportional to 429,961.19, 591,991.20 and 390,103.11

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Solution

The fourth proportional to 429,961.19, 591,991.20 and 390,103.11 is: 537,112.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,961.19 : 591,991.20 = 390,103.11 : x
  2. Step 2: Convert to fraction form
    429,961.19/591,991.20 = 390,103.11/x
  3. Step 3: Cross multiply
    429,961.19x = 591,991.20 × 390,103.11
  4. Step 4: Simplify right side
    429,961.19x = 230,937,608,212.63
  5. Step 5: Solve for x
    x = 230,937,608,212.63/429,961.19
  6. Step 6: Final answer
    x = 537,112.69

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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.