Home / 810,881.55-1,216,928.21-305,940.51

Finding the Fourth Proportional to 810,881.55, 1,216,928.21 and 305,940.51

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Solution

The fourth proportional to 810,881.55, 1,216,928.21 and 305,940.51 is: 459,139.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,881.55 : 1,216,928.21 = 305,940.51 : x
  2. Step 2: Convert to fraction form
    810,881.55/1,216,928.21 = 305,940.51/x
  3. Step 3: Cross multiply
    810,881.55x = 1,216,928.21 × 305,940.51
  4. Step 4: Simplify right side
    810,881.55x = 372,307,635,671.09
  5. Step 5: Solve for x
    x = 372,307,635,671.09/810,881.55
  6. Step 6: Final answer
    x = 459,139.36

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1.5x scale

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.