Home / 1,320,643.20-1,980,381.60-521,659.20

Finding the Fourth Proportional to 1,320,643.20, 1,980,381.60 and 521,659.20

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Solution

The fourth proportional to 1,320,643.20, 1,980,381.60 and 521,659.20 is: 782,258.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,643.20 : 1,980,381.60 = 521,659.20 : x
  2. Step 2: Convert to fraction form
    1,320,643.20/1,980,381.60 = 521,659.20/x
  3. Step 3: Cross multiply
    1,320,643.20x = 1,980,381.60 × 521,659.20
  4. Step 4: Simplify right side
    1,320,643.20x = 1,033,084,281,150.72
  5. Step 5: Solve for x
    x = 1,033,084,281,150.72/1,320,643.20
  6. Step 6: Final answer
    x = 782,258.43

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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.