Home / 1,278,354.90-1,916,184.26-425,198.72

Finding the Fourth Proportional to 1,278,354.90, 1,916,184.26 and 425,198.72

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Solution

The fourth proportional to 1,278,354.90, 1,916,184.26 and 425,198.72 is: 637,349.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,354.90 : 1,916,184.26 = 425,198.72 : x
  2. Step 2: Convert to fraction form
    1,278,354.90/1,916,184.26 = 425,198.72/x
  3. Step 3: Cross multiply
    1,278,354.90x = 1,916,184.26 × 425,198.72
  4. Step 4: Simplify right side
    1,278,354.90x = 814,759,094,636.15
  5. Step 5: Solve for x
    x = 814,759,094,636.15/1,278,354.90
  6. Step 6: Final answer
    x = 637,349.69

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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.