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Finding the Fourth Proportional to 993,942.20, 1,490,913.30 and 836,478.20

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Solution

The fourth proportional to 993,942.20, 1,490,913.30 and 836,478.20 is: 1,254,717.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,942.20 : 1,490,913.30 = 836,478.20 : x
  2. Step 2: Convert to fraction form
    993,942.20/1,490,913.30 = 836,478.20/x
  3. Step 3: Cross multiply
    993,942.20x = 1,490,913.30 × 836,478.20
  4. Step 4: Simplify right side
    993,942.20x = 1,247,116,473,540.06
  5. Step 5: Solve for x
    x = 1,247,116,473,540.06/993,942.20
  6. Step 6: Final answer
    x = 1,254,717.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.