Home / 1,101,855.21-1,520,560.15-618,420.34

Finding the Fourth Proportional to 1,101,855.21, 1,520,560.15 and 618,420.34

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Solution

The fourth proportional to 1,101,855.21, 1,520,560.15 and 618,420.34 is: 853,420.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101,855.21 : 1,520,560.15 = 618,420.34 : x
  2. Step 2: Convert to fraction form
    1,101,855.21/1,520,560.15 = 618,420.34/x
  3. Step 3: Cross multiply
    1,101,855.21x = 1,520,560.15 × 618,420.34
  4. Step 4: Simplify right side
    1,101,855.21x = 940,345,324,953.45
  5. Step 5: Solve for x
    x = 940,345,324,953.45/1,101,855.21
  6. Step 6: Final answer
    x = 853,420.05

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Double scale
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1.5x scale

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.