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Finding the Fourth Proportional to 690,101.64, 952,120.44 and 388,237.32

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Solution

The fourth proportional to 690,101.64, 952,120.44 and 388,237.32 is: 535,643.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,101.64 : 952,120.44 = 388,237.32 : x
  2. Step 2: Convert to fraction form
    690,101.64/952,120.44 = 388,237.32/x
  3. Step 3: Cross multiply
    690,101.64x = 952,120.44 × 388,237.32
  4. Step 4: Simplify right side
    690,101.64x = 369,648,687,942.82
  5. Step 5: Solve for x
    x = 369,648,687,942.82/690,101.64
  6. Step 6: Final answer
    x = 535,643.83

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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.