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Finding the Fourth Proportional to 1,235,261.10, 1,855,844.10 and 1,105,353.30

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Solution

The fourth proportional to 1,235,261.10, 1,855,844.10 and 1,105,353.30 is: 1,660,671.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235,261.10 : 1,855,844.10 = 1,105,353.30 : x
  2. Step 2: Convert to fraction form
    1,235,261.10/1,855,844.10 = 1,105,353.30/x
  3. Step 3: Cross multiply
    1,235,261.10x = 1,855,844.10 × 1,105,353.30
  4. Step 4: Simplify right side
    1,235,261.10x = 2,051,363,400,220.53
  5. Step 5: Solve for x
    x = 2,051,363,400,220.53/1,235,261.10
  6. Step 6: Final answer
    x = 1,660,671.90

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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.