Home / 918,138.70-1,377,208.05-619,540.30

Finding the Fourth Proportional to 918,138.70, 1,377,208.05 and 619,540.30

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Solution

The fourth proportional to 918,138.70, 1,377,208.05 and 619,540.30 is: 929,310.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,138.70 : 1,377,208.05 = 619,540.30 : x
  2. Step 2: Convert to fraction form
    918,138.70/1,377,208.05 = 619,540.30/x
  3. Step 3: Cross multiply
    918,138.70x = 1,377,208.05 × 619,540.30
  4. Step 4: Simplify right side
    918,138.70x = 853,235,888,459.42
  5. Step 5: Solve for x
    x = 853,235,888,459.42/918,138.70
  6. Step 6: Final answer
    x = 929,310.45

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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.