Home / 1,280,191.32-1,919,842.29-712,438.83

Finding the Fourth Proportional to 1,280,191.32, 1,919,842.29 and 712,438.83

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Solution

The fourth proportional to 1,280,191.32, 1,919,842.29 and 712,438.83 is: 1,068,410.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,191.32 : 1,919,842.29 = 712,438.83 : x
  2. Step 2: Convert to fraction form
    1,280,191.32/1,919,842.29 = 712,438.83/x
  3. Step 3: Cross multiply
    1,280,191.32x = 1,919,842.29 × 712,438.83
  4. Step 4: Simplify right side
    1,280,191.32x = 1,367,770,194,872.12
  5. Step 5: Solve for x
    x = 1,367,770,194,872.12/1,280,191.32
  6. Step 6: Final answer
    x = 1,068,410.77

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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.