Home / 401,828.80-603,434.40-389,387.20

Finding the Fourth Proportional to 401,828.80, 603,434.40 and 389,387.20

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Solution

The fourth proportional to 401,828.80, 603,434.40 and 389,387.20 is: 584,750.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,828.80 : 603,434.40 = 389,387.20 : x
  2. Step 2: Convert to fraction form
    401,828.80/603,434.40 = 389,387.20/x
  3. Step 3: Cross multiply
    401,828.80x = 603,434.40 × 389,387.20
  4. Step 4: Simplify right side
    401,828.80x = 234,969,631,399.68
  5. Step 5: Solve for x
    x = 234,969,631,399.68/401,828.80
  6. Step 6: Final answer
    x = 584,750.60

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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.