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Finding the Fourth Proportional to 1,188,827.47, 1,640,736.68 and 665,737.32

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Solution

The fourth proportional to 1,188,827.47, 1,640,736.68 and 665,737.32 is: 918,804.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,827.47 : 1,640,736.68 = 665,737.32 : x
  2. Step 2: Convert to fraction form
    1,188,827.47/1,640,736.68 = 665,737.32/x
  3. Step 3: Cross multiply
    1,188,827.47x = 1,640,736.68 × 665,737.32
  4. Step 4: Simplify right side
    1,188,827.47x = 1,092,299,640,168.90
  5. Step 5: Solve for x
    x = 1,092,299,640,168.90/1,188,827.47
  6. Step 6: Final answer
    x = 918,804.17

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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.