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Finding the Fourth Proportional to 640,280.90, 883,753.64 and 368,376.66

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Solution

The fourth proportional to 640,280.90, 883,753.64 and 368,376.66 is: 508,455.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,280.90 : 883,753.64 = 368,376.66 : x
  2. Step 2: Convert to fraction form
    640,280.90/883,753.64 = 368,376.66/x
  3. Step 3: Cross multiply
    640,280.90x = 883,753.64 × 368,376.66
  4. Step 4: Simplify right side
    640,280.90x = 325,554,213,705.57
  5. Step 5: Solve for x
    x = 325,554,213,705.57/640,280.90
  6. Step 6: Final answer
    x = 508,455.29

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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.