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Finding the Fourth Proportional to 821,818, 1,226,708.81 and 724,747.77

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Solution

The fourth proportional to 821,818, 1,226,708.81 and 724,747.77 is: 1,081,814.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,818 : 1,226,708.81 = 724,747.77 : x
  2. Step 2: Convert to fraction form
    821,818/1,226,708.81 = 724,747.77/x
  3. Step 3: Cross multiply
    821,818x = 1,226,708.81 × 724,747.77
  4. Step 4: Simplify right side
    821,818x = 889,054,474,486.85
  5. Step 5: Solve for x
    x = 889,054,474,486.85/821,818
  6. Step 6: Final answer
    x = 1,081,814.31

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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.