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Finding the Fourth Proportional to 694,362.16, 958,174.54 and 388,385.47

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Solution

The fourth proportional to 694,362.16, 958,174.54 and 388,385.47 is: 535,946.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,362.16 : 958,174.54 = 388,385.47 : x
  2. Step 2: Convert to fraction form
    694,362.16/958,174.54 = 388,385.47/x
  3. Step 3: Cross multiply
    694,362.16x = 958,174.54 × 388,385.47
  4. Step 4: Simplify right side
    694,362.16x = 372,141,069,059.93
  5. Step 5: Solve for x
    x = 372,141,069,059.93/694,362.16
  6. Step 6: Final answer
    x = 535,946.64

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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.