Home / 1,320,402.96-1,979,860.86-421,633.44

Finding the Fourth Proportional to 1,320,402.96, 1,979,860.86 and 421,633.44

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Solution

The fourth proportional to 1,320,402.96, 1,979,860.86 and 421,633.44 is: 632,212.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,402.96 : 1,979,860.86 = 421,633.44 : x
  2. Step 2: Convert to fraction form
    1,320,402.96/1,979,860.86 = 421,633.44/x
  3. Step 3: Cross multiply
    1,320,402.96x = 1,979,860.86 × 421,633.44
  4. Step 4: Simplify right side
    1,320,402.96x = 834,775,545,123.16
  5. Step 5: Solve for x
    x = 834,775,545,123.16/1,320,402.96
  6. Step 6: Final answer
    x = 632,212.72

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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.