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Finding the Fourth Proportional to 528,930.91, 793,390.86 and 129,573.76

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Solution

The fourth proportional to 528,930.91, 793,390.86 and 129,573.76 is: 194,359.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,930.91 : 793,390.86 = 129,573.76 : x
  2. Step 2: Convert to fraction form
    528,930.91/793,390.86 = 129,573.76/x
  3. Step 3: Cross multiply
    528,930.91x = 793,390.86 × 129,573.76
  4. Step 4: Simplify right side
    528,930.91x = 102,802,636,879.83
  5. Step 5: Solve for x
    x = 102,802,636,879.83/528,930.91
  6. Step 6: Final answer
    x = 194,359.29

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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.