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Finding the Fourth Proportional to 719,956.76, 993,490.31 and 397,664.03

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Solution

The fourth proportional to 719,956.76, 993,490.31 and 397,664.03 is: 548,748.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,956.76 : 993,490.31 = 397,664.03 : x
  2. Step 2: Convert to fraction form
    719,956.76/993,490.31 = 397,664.03/x
  3. Step 3: Cross multiply
    719,956.76x = 993,490.31 × 397,664.03
  4. Step 4: Simplify right side
    719,956.76x = 395,075,363,918.44
  5. Step 5: Solve for x
    x = 395,075,363,918.44/719,956.76
  6. Step 6: Final answer
    x = 548,748.74

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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.