Home / 429,439.10-644,231.55-129,917.30

Finding the Fourth Proportional to 429,439.10, 644,231.55 and 129,917.30

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Solution

The fourth proportional to 429,439.10, 644,231.55 and 129,917.30 is: 194,898.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,439.10 : 644,231.55 = 129,917.30 : x
  2. Step 2: Convert to fraction form
    429,439.10/644,231.55 = 129,917.30/x
  3. Step 3: Cross multiply
    429,439.10x = 644,231.55 × 129,917.30
  4. Step 4: Simplify right side
    429,439.10x = 83,696,823,550.82
  5. Step 5: Solve for x
    x = 83,696,823,550.82/429,439.10
  6. Step 6: Final answer
    x = 194,898.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.