Home / 1,320,989.16-1,980,138.78-521,172.84

Finding the Fourth Proportional to 1,320,989.16, 1,980,138.78 and 521,172.84

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Solution

The fourth proportional to 1,320,989.16, 1,980,138.78 and 521,172.84 is: 781,228.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,989.16 : 1,980,138.78 = 521,172.84 : x
  2. Step 2: Convert to fraction form
    1,320,989.16/1,980,138.78 = 521,172.84/x
  3. Step 3: Cross multiply
    1,320,989.16x = 1,980,138.78 × 521,172.84
  4. Step 4: Simplify right side
    1,320,989.16x = 1,031,994,551,566.74
  5. Step 5: Solve for x
    x = 1,031,994,551,566.74/1,320,989.16
  6. Step 6: Final answer
    x = 781,228.63

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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.