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Finding the Fourth Proportional to 640,518, 883,916.28 and 385,879.92

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Solution

The fourth proportional to 640,518, 883,916.28 and 385,879.92 is: 532,515.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,518 : 883,916.28 = 385,879.92 : x
  2. Step 2: Convert to fraction form
    640,518/883,916.28 = 385,879.92/x
  3. Step 3: Cross multiply
    640,518x = 883,916.28 × 385,879.92
  4. Step 4: Simplify right side
    640,518x = 341,085,543,413.10
  5. Step 5: Solve for x
    x = 341,085,543,413.10/640,518
  6. Step 6: Final answer
    x = 532,515.16

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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.