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Finding the Fourth Proportional to 492,098.34, 679,004.73 and 288,138.72

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Solution

The fourth proportional to 492,098.34, 679,004.73 and 288,138.72 is: 397,578.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,098.34 : 679,004.73 = 288,138.72 : x
  2. Step 2: Convert to fraction form
    492,098.34/679,004.73 = 288,138.72/x
  3. Step 3: Cross multiply
    492,098.34x = 679,004.73 × 288,138.72
  4. Step 4: Simplify right side
    492,098.34x = 195,647,553,776.15
  5. Step 5: Solve for x
    x = 195,647,553,776.15/492,098.34
  6. Step 6: Final answer
    x = 397,578.16

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1.5x scale

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.