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Finding the Fourth Proportional to 429,736.88, 644,204.65 and 145,228.47

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Solution

The fourth proportional to 429,736.88, 644,204.65 and 145,228.47 is: 217,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,736.88 : 644,204.65 = 145,228.47 : x
  2. Step 2: Convert to fraction form
    429,736.88/644,204.65 = 145,228.47/x
  3. Step 3: Cross multiply
    429,736.88x = 644,204.65 × 145,228.47
  4. Step 4: Simplify right side
    429,736.88x = 93,556,855,323.31
  5. Step 5: Solve for x
    x = 93,556,855,323.31/429,736.88
  6. Step 6: Final answer
    x = 217,707.30

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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.