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Finding the Fourth Proportional to 694,972.17, 959,008.61 and 388,978.47

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Solution

The fourth proportional to 694,972.17, 959,008.61 and 388,978.47 is: 536,760.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,972.17 : 959,008.61 = 388,978.47 : x
  2. Step 2: Convert to fraction form
    694,972.17/959,008.61 = 388,978.47/x
  3. Step 3: Cross multiply
    694,972.17x = 959,008.61 × 388,978.47
  4. Step 4: Simplify right side
    694,972.17x = 373,033,702,807.07
  5. Step 5: Solve for x
    x = 373,033,702,807.07/694,972.17
  6. Step 6: Final answer
    x = 536,760.63

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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.