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Finding the Fourth Proportional to 1,207,455.40, 1,811,183.10 and 872,844.40

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Solution

The fourth proportional to 1,207,455.40, 1,811,183.10 and 872,844.40 is: 1,309,266.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,455.40 : 1,811,183.10 = 872,844.40 : x
  2. Step 2: Convert to fraction form
    1,207,455.40/1,811,183.10 = 872,844.40/x
  3. Step 3: Cross multiply
    1,207,455.40x = 1,811,183.10 × 872,844.40
  4. Step 4: Simplify right side
    1,207,455.40x = 1,580,881,026,209.64
  5. Step 5: Solve for x
    x = 1,580,881,026,209.64/1,207,455.40
  6. Step 6: Final answer
    x = 1,309,266.60

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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.