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Finding the Fourth Proportional to 1,353,531.02, 1,867,872.54 and 809,689.72

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Solution

The fourth proportional to 1,353,531.02, 1,867,872.54 and 809,689.72 is: 1,117,371.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353,531.02 : 1,867,872.54 = 809,689.72 : x
  2. Step 2: Convert to fraction form
    1,353,531.02/1,867,872.54 = 809,689.72/x
  3. Step 3: Cross multiply
    1,353,531.02x = 1,867,872.54 × 809,689.72
  4. Step 4: Simplify right side
    1,353,531.02x = 1,512,397,193,908.29
  5. Step 5: Solve for x
    x = 1,512,397,193,908.29/1,353,531.02
  6. Step 6: Final answer
    x = 1,117,371.65

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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.