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Finding the Fourth Proportional to 613,296.80, 919,580.70 and 376,809.20

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Solution

The fourth proportional to 613,296.80, 919,580.70 and 376,809.20 is: 564,989.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,296.80 : 919,580.70 = 376,809.20 : x
  2. Step 2: Convert to fraction form
    613,296.80/919,580.70 = 376,809.20/x
  3. Step 3: Cross multiply
    613,296.80x = 919,580.70 × 376,809.20
  4. Step 4: Simplify right side
    613,296.80x = 346,506,467,902.44
  5. Step 5: Solve for x
    x = 346,506,467,902.44/613,296.80
  6. Step 6: Final answer
    x = 564,989.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.