Home / 640,569.78-883,947.87-354,072.78

Finding the Fourth Proportional to 640,569.78, 883,947.87 and 354,072.78

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Solution

The fourth proportional to 640,569.78, 883,947.87 and 354,072.78 is: 488,599.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,569.78 : 883,947.87 = 354,072.78 : x
  2. Step 2: Convert to fraction form
    640,569.78/883,947.87 = 354,072.78/x
  3. Step 3: Cross multiply
    640,569.78x = 883,947.87 × 354,072.78
  4. Step 4: Simplify right side
    640,569.78x = 312,981,879,705.98
  5. Step 5: Solve for x
    x = 312,981,879,705.98/640,569.78
  6. Step 6: Final answer
    x = 488,599.20

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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.