Home / 1,288,207.80-1,932,311.70-721,337.40

Finding the Fourth Proportional to 1,288,207.80, 1,932,311.70 and 721,337.40

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Solution

The fourth proportional to 1,288,207.80, 1,932,311.70 and 721,337.40 is: 1,082,006.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,207.80 : 1,932,311.70 = 721,337.40 : x
  2. Step 2: Convert to fraction form
    1,288,207.80/1,932,311.70 = 721,337.40/x
  3. Step 3: Cross multiply
    1,288,207.80x = 1,932,311.70 × 721,337.40
  4. Step 4: Simplify right side
    1,288,207.80x = 1,393,848,697,667.58
  5. Step 5: Solve for x
    x = 1,393,848,697,667.58/1,288,207.80
  6. Step 6: Final answer
    x = 1,082,006.10

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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.