Home / 1,320,650.30-1,980,715.74-421,849.80

Finding the Fourth Proportional to 1,320,650.30, 1,980,715.74 and 421,849.80

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Solution

The fourth proportional to 1,320,650.30, 1,980,715.74 and 421,849.80 is: 632,691.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,650.30 : 1,980,715.74 = 421,849.80 : x
  2. Step 2: Convert to fraction form
    1,320,650.30/1,980,715.74 = 421,849.80/x
  3. Step 3: Cross multiply
    1,320,650.30x = 1,980,715.74 × 421,849.80
  4. Step 4: Simplify right side
    1,320,650.30x = 835,564,538,775.85
  5. Step 5: Solve for x
    x = 835,564,538,775.85/1,320,650.30
  6. Step 6: Final answer
    x = 632,691.74

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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.