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Finding the Fourth Proportional to 719,967.64, 993,616.89 and 397,712.92

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Solution

The fourth proportional to 719,967.64, 993,616.89 and 397,712.92 is: 548,877.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,967.64 : 993,616.89 = 397,712.92 : x
  2. Step 2: Convert to fraction form
    719,967.64/993,616.89 = 397,712.92/x
  3. Step 3: Cross multiply
    719,967.64x = 993,616.89 × 397,712.92
  4. Step 4: Simplify right side
    719,967.64x = 395,174,274,683.22
  5. Step 5: Solve for x
    x = 395,174,274,683.22/719,967.64
  6. Step 6: Final answer
    x = 548,877.83

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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.