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Finding the Fourth Proportional to 429,340.58, 644,085.09 and 145,033.21

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Solution

The fourth proportional to 429,340.58, 644,085.09 and 145,033.21 is: 217,574.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,340.58 : 644,085.09 = 145,033.21 : x
  2. Step 2: Convert to fraction form
    429,340.58/644,085.09 = 145,033.21/x
  3. Step 3: Cross multiply
    429,340.58x = 644,085.09 × 145,033.21
  4. Step 4: Simplify right side
    429,340.58x = 93,413,726,505.63
  5. Step 5: Solve for x
    x = 93,413,726,505.63/429,340.58
  6. Step 6: Final answer
    x = 217,574.89

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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.