Home / 1,280,214.72-1,919,899.92-427,051.26

Finding the Fourth Proportional to 1,280,214.72, 1,919,899.92 and 427,051.26

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Solution

The fourth proportional to 1,280,214.72, 1,919,899.92 and 427,051.26 is: 640,436.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,214.72 : 1,919,899.92 = 427,051.26 : x
  2. Step 2: Convert to fraction form
    1,280,214.72/1,919,899.92 = 427,051.26/x
  3. Step 3: Cross multiply
    1,280,214.72x = 1,919,899.92 × 427,051.26
  4. Step 4: Simplify right side
    1,280,214.72x = 819,895,679,909.90
  5. Step 5: Solve for x
    x = 819,895,679,909.90/1,280,214.72
  6. Step 6: Final answer
    x = 640,436.07

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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.