Home / 1,320,648.30-1,980,712.74-421,847.80

Finding the Fourth Proportional to 1,320,648.30, 1,980,712.74 and 421,847.80

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Solution

The fourth proportional to 1,320,648.30, 1,980,712.74 and 421,847.80 is: 632,688.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,648.30 : 1,980,712.74 = 421,847.80 : x
  2. Step 2: Convert to fraction form
    1,320,648.30/1,980,712.74 = 421,847.80/x
  3. Step 3: Cross multiply
    1,320,648.30x = 1,980,712.74 × 421,847.80
  4. Step 4: Simplify right side
    1,320,648.30x = 835,559,308,431.12
  5. Step 5: Solve for x
    x = 835,559,308,431.12/1,320,648.30
  6. Step 6: Final answer
    x = 632,688.74

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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.