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Finding the Fourth Proportional to 445,707.10, 668,675.92 and 261,005.78

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Solution

The fourth proportional to 445,707.10, 668,675.92 and 261,005.78 is: 391,576.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,707.10 : 668,675.92 = 261,005.78 : x
  2. Step 2: Convert to fraction form
    445,707.10/668,675.92 = 261,005.78/x
  3. Step 3: Cross multiply
    445,707.10x = 668,675.92 × 261,005.78
  4. Step 4: Simplify right side
    445,707.10x = 174,528,282,356.86
  5. Step 5: Solve for x
    x = 174,528,282,356.86/445,707.10
  6. Step 6: Final answer
    x = 391,576.17

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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.