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Finding the Fourth Proportional to 1,260,861.78, 1,739,987.26 and 687,902.01

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Solution

The fourth proportional to 1,260,861.78, 1,739,987.26 and 687,902.01 is: 949,303.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,861.78 : 1,739,987.26 = 687,902.01 : x
  2. Step 2: Convert to fraction form
    1,260,861.78/1,739,987.26 = 687,902.01/x
  3. Step 3: Cross multiply
    1,260,861.78x = 1,739,987.26 × 687,902.01
  4. Step 4: Simplify right side
    1,260,861.78x = 1,196,940,733,528.39
  5. Step 5: Solve for x
    x = 1,196,940,733,528.39/1,260,861.78
  6. Step 6: Final answer
    x = 949,303.68

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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.