Home / 1,320,700.75-1,980,954.23-421,901.16

Finding the Fourth Proportional to 1,320,700.75, 1,980,954.23 and 421,901.16

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Solution

The fourth proportional to 1,320,700.75, 1,980,954.23 and 421,901.16 is: 632,820.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,700.75 : 1,980,954.23 = 421,901.16 : x
  2. Step 2: Convert to fraction form
    1,320,700.75/1,980,954.23 = 421,901.16/x
  3. Step 3: Cross multiply
    1,320,700.75x = 1,980,954.23 × 421,901.16
  4. Step 4: Simplify right side
    1,320,700.75x = 835,766,878,005.82
  5. Step 5: Solve for x
    x = 835,766,878,005.82/1,320,700.75
  6. Step 6: Final answer
    x = 632,820.78

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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.