Home / 790,784.88-1,091,288.32-428,208.78

Finding the Fourth Proportional to 790,784.88, 1,091,288.32 and 428,208.78

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Solution

The fourth proportional to 790,784.88, 1,091,288.32 and 428,208.78 is: 590,930.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,784.88 : 1,091,288.32 = 428,208.78 : x
  2. Step 2: Convert to fraction form
    790,784.88/1,091,288.32 = 428,208.78/x
  3. Step 3: Cross multiply
    790,784.88x = 1,091,288.32 × 428,208.78
  4. Step 4: Simplify right side
    790,784.88x = 467,299,240,135.45
  5. Step 5: Solve for x
    x = 467,299,240,135.45/790,784.88
  6. Step 6: Final answer
    x = 590,930.92

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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.