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Finding the Fourth Proportional to 1,247,797.64, 1,721,961.90 and 674,837.81

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Solution

The fourth proportional to 1,247,797.64, 1,721,961.90 and 674,837.81 is: 931,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,797.64 : 1,721,961.90 = 674,837.81 : x
  2. Step 2: Convert to fraction form
    1,247,797.64/1,721,961.90 = 674,837.81/x
  3. Step 3: Cross multiply
    1,247,797.64x = 1,721,961.90 × 674,837.81
  4. Step 4: Simplify right side
    1,247,797.64x = 1,162,044,998,079.20
  5. Step 5: Solve for x
    x = 1,162,044,998,079.20/1,247,797.64
  6. Step 6: Final answer
    x = 931,276.80

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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.