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Finding the Fourth Proportional to 485,495.38, 670,020.11 and 281,544.53

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Solution

The fourth proportional to 485,495.38, 670,020.11 and 281,544.53 is: 388,552.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,495.38 : 670,020.11 = 281,544.53 : x
  2. Step 2: Convert to fraction form
    485,495.38/670,020.11 = 281,544.53/x
  3. Step 3: Cross multiply
    485,495.38x = 670,020.11 × 281,544.53
  4. Step 4: Simplify right side
    485,495.38x = 188,640,496,960.50
  5. Step 5: Solve for x
    x = 188,640,496,960.50/485,495.38
  6. Step 6: Final answer
    x = 388,552.61

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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.