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Finding the Fourth Proportional to 861,423.30, 1,283,295 and 822,561.72

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Solution

The fourth proportional to 861,423.30, 1,283,295 and 822,561.72 is: 1,225,401.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,423.30 : 1,283,295 = 822,561.72 : x
  2. Step 2: Convert to fraction form
    861,423.30/1,283,295 = 822,561.72/x
  3. Step 3: Cross multiply
    861,423.30x = 1,283,295 × 822,561.72
  4. Step 4: Simplify right side
    861,423.30x = 1,055,589,342,467.40
  5. Step 5: Solve for x
    x = 1,055,589,342,467.40/861,423.30
  6. Step 6: Final answer
    x = 1,225,401.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.