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Finding the Fourth Proportional to 708,007.74, 976,604.31 and 421,313.82

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Solution

The fourth proportional to 708,007.74, 976,604.31 and 421,313.82 is: 581,147.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,007.74 : 976,604.31 = 421,313.82 : x
  2. Step 2: Convert to fraction form
    708,007.74/976,604.31 = 421,313.82/x
  3. Step 3: Cross multiply
    708,007.74x = 976,604.31 × 421,313.82
  4. Step 4: Simplify right side
    708,007.74x = 411,456,892,474.56
  5. Step 5: Solve for x
    x = 411,456,892,474.56/708,007.74
  6. Step 6: Final answer
    x = 581,147.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.