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Finding the Fourth Proportional to 1,017,919.96, 1,405,274.88 and 784,837.80

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Solution

The fourth proportional to 1,017,919.96, 1,405,274.88 and 784,837.80 is: 1,083,496.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017,919.96 : 1,405,274.88 = 784,837.80 : x
  2. Step 2: Convert to fraction form
    1,017,919.96/1,405,274.88 = 784,837.80/x
  3. Step 3: Cross multiply
    1,017,919.96x = 1,405,274.88 × 784,837.80
  4. Step 4: Simplify right side
    1,017,919.96x = 1,102,912,845,214.46
  5. Step 5: Solve for x
    x = 1,102,912,845,214.46/1,017,919.96
  6. Step 6: Final answer
    x = 1,083,496.63

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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.