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Finding the Fourth Proportional to 1,315,753.86, 1,815,755.19 and 771,898.92

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Solution

The fourth proportional to 1,315,753.86, 1,815,755.19 and 771,898.92 is: 1,065,229.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,753.86 : 1,815,755.19 = 771,898.92 : x
  2. Step 2: Convert to fraction form
    1,315,753.86/1,815,755.19 = 771,898.92/x
  3. Step 3: Cross multiply
    1,315,753.86x = 1,815,755.19 × 771,898.92
  4. Step 4: Simplify right side
    1,315,753.86x = 1,401,579,470,145.39
  5. Step 5: Solve for x
    x = 1,401,579,470,145.39/1,315,753.86
  6. Step 6: Final answer
    x = 1,065,229.23

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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.