Home / 1,320,128.32-1,980,175.20-322,864.96

Finding the Fourth Proportional to 1,320,128.32, 1,980,175.20 and 322,864.96

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Solution

The fourth proportional to 1,320,128.32, 1,980,175.20 and 322,864.96 is: 484,293.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,128.32 : 1,980,175.20 = 322,864.96 : x
  2. Step 2: Convert to fraction form
    1,320,128.32/1,980,175.20 = 322,864.96/x
  3. Step 3: Cross multiply
    1,320,128.32x = 1,980,175.20 × 322,864.96
  4. Step 4: Simplify right side
    1,320,128.32x = 639,329,186,740.99
  5. Step 5: Solve for x
    x = 639,329,186,740.99/1,320,128.32
  6. Step 6: Final answer
    x = 484,293.21

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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.