Home / 728,120.88-1,004,811.48-405,851.40

Finding the Fourth Proportional to 728,120.88, 1,004,811.48 and 405,851.40

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Solution

The fourth proportional to 728,120.88, 1,004,811.48 and 405,851.40 is: 560,077.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,120.88 : 1,004,811.48 = 405,851.40 : x
  2. Step 2: Convert to fraction form
    728,120.88/1,004,811.48 = 405,851.40/x
  3. Step 3: Cross multiply
    728,120.88x = 1,004,811.48 × 405,851.40
  4. Step 4: Simplify right side
    728,120.88x = 407,804,145,894.07
  5. Step 5: Solve for x
    x = 407,804,145,894.07/728,120.88
  6. Step 6: Final answer
    x = 560,077.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.