Home / 429,742.26-644,447.34-145,357.20

Finding the Fourth Proportional to 429,742.26, 644,447.34 and 145,357.20

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Solution

The fourth proportional to 429,742.26, 644,447.34 and 145,357.20 is: 217,979.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,742.26 : 644,447.34 = 145,357.20 : x
  2. Step 2: Convert to fraction form
    429,742.26/644,447.34 = 145,357.20/x
  3. Step 3: Cross multiply
    429,742.26x = 644,447.34 × 145,357.20
  4. Step 4: Simplify right side
    429,742.26x = 93,675,060,889.85
  5. Step 5: Solve for x
    x = 93,675,060,889.85/429,742.26
  6. Step 6: Final answer
    x = 217,979.63

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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.