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Finding the Fourth Proportional to 492,752.10, 739,128.15 and 445,512.90

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Solution

The fourth proportional to 492,752.10, 739,128.15 and 445,512.90 is: 668,269.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,752.10 : 739,128.15 = 445,512.90 : x
  2. Step 2: Convert to fraction form
    492,752.10/739,128.15 = 445,512.90/x
  3. Step 3: Cross multiply
    492,752.10x = 739,128.15 × 445,512.90
  4. Step 4: Simplify right side
    492,752.10x = 329,291,125,578.14
  5. Step 5: Solve for x
    x = 329,291,125,578.14/492,752.10
  6. Step 6: Final answer
    x = 668,269.35

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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.