Home / 1,201,505.20-1,801,820.40-402,812.80

Finding the Fourth Proportional to 1,201,505.20, 1,801,820.40 and 402,812.80

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Solution

The fourth proportional to 1,201,505.20, 1,801,820.40 and 402,812.80 is: 604,072.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201,505.20 : 1,801,820.40 = 402,812.80 : x
  2. Step 2: Convert to fraction form
    1,201,505.20/1,801,820.40 = 402,812.80/x
  3. Step 3: Cross multiply
    1,201,505.20x = 1,801,820.40 × 402,812.80
  4. Step 4: Simplify right side
    1,201,505.20x = 725,796,320,421.12
  5. Step 5: Solve for x
    x = 725,796,320,421.12/1,201,505.20
  6. Step 6: Final answer
    x = 604,072.56

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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.