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Finding the Fourth Proportional to 1,260,865.30, 1,739,992.41 and 687,905.47

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Solution

The fourth proportional to 1,260,865.30, 1,739,992.41 and 687,905.47 is: 949,308.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,865.30 : 1,739,992.41 = 687,905.47 : x
  2. Step 2: Convert to fraction form
    1,260,865.30/1,739,992.41 = 687,905.47/x
  3. Step 3: Cross multiply
    1,260,865.30x = 1,739,992.41 × 687,905.47
  4. Step 4: Simplify right side
    1,260,865.30x = 1,196,950,298,800.99
  5. Step 5: Solve for x
    x = 1,196,950,298,800.99/1,260,865.30
  6. Step 6: Final answer
    x = 949,308.62

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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.